Download Biology 120 Mock Final Examination

The Biology 120 Peer Mentors and Student Learning Services Present:
Biology 120 Mock Final Examination
Version 2 – revised version
Questions modified: 6, 52, 56, 81, 85, 93
Saturday, December 3rd, 2016
Time: 1:30 pm
Location: HLTH 1150
Important note: This mock final exam was written by your Biology 120 Peer Mentors. It is
designed to help you test yourself on topics and concepts covered in class; it is not a preview of
the final exam.
You are required to remain in your seat for 30 minutes. No talking and no use of any electronic
devices.
This exam consists of 100 questions. Carefully read the questions and all possible answers and
choose the best answer. Only select one answer per question.
We encourage you to take note of your start and finish time, or to keep track of how many
questions you were able to complete. This may help you to better judge your time for the final
exam.
Start Time: ________________
End Time: ________________
Questions completed: ___________
You are invited to return to HLTH 1150 at ~3:00 for a Question and Answer period with your
Peer Mentors.
Visit http://library.usask.ca/sss for the Structured Study Session schedule during the last week of classes.
Biology 120 Mock Final Exam – revised version, December 2016
2
1. Which of the following is not a true statement regarding NADH and NADPH?
a) NADPH contains an extra phosphate group.
b) NADH is only found in mitochondria.
c) NADPH is associated with photosynthesis, not cellular respiration.
d) All of the above
2. Calcium (Ca2+) is very important for many cell processes in the human body. Most cells keep
the inside of the cell at a lower concentration of calcium than the outside of the cell to
facilitate these processes. What is the most likely mode of calcium transport across the cell
membrane?
a) Diffusion through the membrane phospholipids
b) Carrier proteins called aquaporins
c) Diffusion through structured openings in the phospholipid membrane
d) Carrier proteins called ion channels
3. Which of the following statements about the plasma membrane is FALSE?
a) Components of the outer half of the bilayer are different than the inner half
b) Molecules in the membrane are free to move around each other
c) Molecules are free to move between the two layers
d) Both A and C
4. Which of the following best describes how ATP is generated during glycolysis?
a) Substrate level phosphorylation
b) Reduction of fatty acids
c) Oxidation of acetyl groups
d) Oxidative phosphorylation
5. The light reactions of photosynthesis and aerobic respiration are similar in that:
a) both processes synthesize NADPH.
b) both processes begin with glucose.
c) both processes use a proton-motive force to generate ATP.
d) both synthesize ATP through photophosphorylation.
6. A DNA template strand with the sequence 3’-AACGTAACG-5’ is transcribed. What is the
sequence of the mRNA molecule synthesized?
a) 5’ – AACGTAACG – 3’
b) 5’ – UUGCAUUGC– 3’
c) 5’ – AACGUAACG– 3’
d) 5’ – TTGCATTGC– 3’
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam – revised version, December 2016
3
7. What modifications must occur during mRNA processing in eukaryotic cells to achieve a
mature mRNA that is ready for translation?
a) Addition of a polyadenosine tail
b) Addition of 5’ methyl guanine cap
c) Splicing out of any introns and ligation of exons
d) All of the above
8. In photosynthesis, ATP is synthesized due to:
a) Rubisco.
b) chemiosmosis using the chloroplast ATP synthase.
c) a proton motive force produced by NADH reduction.
d) oxidative phosphorylation.
9. A nonsense mutation results in:
a) multiple amino acid alterations.
b) a single amino acid alteration.
c) the end of the polypeptide chain.
d) no change in the amino acid sequence.
10. In sickle cell disease, a single nucleotide change in the β-globin gene results in a valine
replacing a glutamate. This is an example of a(n) __________ mutation.
a) missense
b) deletion
c) nonsense
d) insertion
11. Production of one molecule of 3-phosphoglyceraldehyde (a triose phosphate) requires how
many molecules of CO2?
a) 3
b) 1
c) 6
d) 2
12. Glucose an excellent source of energy for a cell because …
a) it is found in many foods that we eat.
b) of its strong electronegative properties.
c) it exists as an unbranched chain.
d) electrons are easily removed from it.
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam – revised version, December 2016
4
13. Transcription occurs at the ____ end of the template strand, forming an mRNA in the ____
direction.
a) 5'; 5' to 3'
b) 5'; 3' to 5'
c) 3'; 5' to 3'
d) 3’; 3' to 5'
14. What path do proteins meant for secretion take?
a) ER  cis Golgi  medial Golgi  trans Golgi  plasma membrane
b) ER  trans Golgi  medial Golgi  cis Golgi  plasma membrane
c) cis-Golgi  trans Golgi  medial Golgi  lysosome  plasma membrane
d) ER  medial Golgi  trans Golgi  cis Golgi  plasma membrane
15. The enzyme ________ unzips and unwinds DNA strands during the process of gene
transcription.
a) DNA polymerase
b) helicase
c) primase
d) DNA ligase
16. The Calvin cycle requires each of the following except:
a) ATP
b) O2
c) CO2
d) NADPH
17. A sample of DNA is found to have 29% adenine. How much guanine would you expect to be
present in the same sample?
a) 21%
b) 29%
c) 42%
d) 58%
18. Initiation of translation requires the assembly of what components at the start codon?
a) Methionine amino-acyl tRNA
b) Large and small ribosomal subunits and a methionine amino-acyl tRNA
c) Large and small ribosomal subunits
d) Large ribosomal subunit and a cysteine amino-acyl tRNA
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam – revised version, December 2016
19. A recently replicated DNA daughter helix has a 5’ to 3’ strand with many fragments ending
in disconnected but adjacent sugar and phosphate groups. This cell likely has a problem
with which enzyme?
a) DNA Polymerase
b) Primase
c) Ligase
d) Helicase
20. Eukaryotic mRNA:
a) must be spliced.
b) is transcribed in the nucleus and translated in the cytosol.
c) has a 3’ guanine cap and a 5’ poly-A tail.
d) is a polymer of adenine, thymine, guanine, and cytosine.
21. The rise in cyanobacteria 2.5 billion years ago resulted in:
a) the accumulation of O2 in the atmosphere.
b) the widespread use of H2O as the electron donor for photosynthesis.
c) the formation of banded iron deposits.
d) All of the above
22. In animal cell division, _________ make up the spindle fibers that move chromosomes to
the poles, and ________ help complete cytokinesis by facilitating the cleavage furrow.
a) Microfilaments; microtubules
b) Microtubules; microfilaments
c) Microtubules; Intermediate filaments
d) Intermediate filaments; microfilaments
23. When two genes are linked…
a) both Mendel’s first and second laws still apply
b) Mendel’s first law applies but his second law does not
c) Mendel’s second law applies but his first law does not
d) Neither of Mendel’s laws apply
24. A woman with red-green colour blindness (an X-linked recessive trait) and a man with
normal vision have 8 children: 4 daughters and 4 sons. Based on probability, which of the
following is likely true of their children?
a) 2 daughters and 2 sons are red-green colour blind
b) All 4 sons and no daughters are red-green colour blind
c) All 4 daughters and no sons are red-green colour blind
d) All 8 children are red-green colour blind
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
5
Biology 120 Mock Final Exam – revised version, December 2016
25. How would a large protein be transported through a plasma membrane?
a) Endocytosis or exocytosis
b) Facilitated diffusion
c) Active transport
d) It depends on the polarity, charge, and size of the protein
26. A molecule that donates an electron is said to be:
a) Reduced
b) Phosphorylated
c) Oxidized
d) Catabolized
27. In what way(s) are proteins more complex than DNA?
a) Proteins can form longer strands of monomers.
b) Proteins have a larger variety of monomers.
c) Proteins often have a more complex 3-dimensional structure.
d) Both a) and b)
e) Both b) and c)
28. An unknown nucleic acid was found to contain 12% A, 24% T, 24% G, and 40% C. This
suggests that it is:
a) A double stranded DNA molecule
b) A double stranded RNA molecule
c) A single stranded DNA molecule
d) A single stranded RNA molecule
29. Glycolysis occurs in the __________, pyruvate oxidation occurs in the __________, and the
citric acid cycle occurs in the __________________.
a) Mitochondrial intermembrane space; mitochondrial outer membrane; cytosol
b) Cytosol; mitochondrial matrix; mitochondrial matrix
c) Mitochondrial matrix; mitochondrial matrix; cytosol
d) Cytosol; cytosol; mitochondrial matrix
30. Two turns of the citric acid cycle, including pyruvate oxidation, yields:
a) 4 NAD+, FAD, 2 ADP
b) 3 CO2, 4 NADH, 2 FADH2, ATP
c) 6 CO2, 10 NADH, 2 FADH, 2 ATP
d) 38 ATP
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
6
Biology 120 Mock Final Exam – revised version, December 2016
31. Which of the following is NOT a common cellular component of both eukaryotic and
prokaryotic cells?
a) RNA
b) Plasma membrane
c) Ribosomes
d) Mitochondria
32. One molecule of pyruvate through the citric acid cycle and electron transport chain
produces:
a) 1 molecule of ATP
b) 3 molecules of ATP
c) 38 molecules of ATP
d) 12 molecules of ATP
33. Which of the following is true?
a) All proteins are enzymes
b) Enzymes have high activation energies
c) Not all proteins are made from amino acids
d) None of the above
34. Which of the following is TRUE about DNA structure?
a) It has a backbone with a slight positive charge.
b) The “rungs” are pairs of purines or pyrimidines.
c) The two strands are parallel.
d) None of the above.
35. Eukaryotes increase the speed of DNA replication by…
a) increasing the concentration of DNA polymerase
b) increasing their cellular temperature to increase residual energy
c) creating multiple origins of replication
d) storing DNA in linear chromosomes
36. Which of the following is the complementary strand to a DNA template strand with the
sequence 5’ – CGATTATCG – 3’?
a) 5’-GCTAATAGC-3’
b) 5’-CGATAATCG-3’
c) 5’-CGAUAAUCG-3’
d) 3’-CGATAATCG-5’
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
7
Biology 120 Mock Final Exam – revised version, December 2016
8
37. An unknown animal cell contains extensive amounts of endoplasmic reticulum, with many
vesicles travelling from the Golgi apparatus towards the cell membrane. You hypothesize
that the cell’s primary function is most likely:
a) Muscle movement
b) Absorption of nutrients
c) Storage of fats
d) Making and secreting enzymes and/or hormones
38. The plant cell wall is primarily made of ______ and the exoskeleton of an insect is largely
made of _____:
a) chitin, cellulose
b) cellulose, chitin
c) chitin, proteins
d) cellulose, proteins
39. Electrons from photosystem I are donated to NADP+ reductase on the _________ face of
the thylakoid membrane, where _________ is reduced to ________ .
a) lumen; NADP+ ; NADPH
b) lumen; NADPH ; NADP+
c) stroma; NADP+ ; NADPH
d) stroma; NADPH ; NADP+
40. The Calvin cycle is called light independent, but it will come to a halt if a plant is deprived of
light for a substantial amount of time. This is because:
a) the Calvin cycle converts light energy to chemical energy using an electron
transport chain.
b) the enzyme Rubisco requires light to function.
c) the plant is unable to find CO2 when it is dark.
d) the Calvin cycle requires a constant supply of ATP and NADPH generated by light
dependent reactions.
41. Sterols are an example of what type of macromolecule?
a) Nucleic acid
b) Lipid
c) Protein
d) Carbohydrate
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam – revised version, December 2016
9
42. Your research lab works with fruit flies. In your latest experiment, you cross a fly who has
the genotype RR with another whose genotype is rr. What percentage of their offspring will
be heterozygous?
a) 0%
b) 25%
c) 50%
d) 100%
43. Eye colour in snowy owls is determined by a single gene with 4 possible alleles. If an
individual is heterozygous for that gene, how many alleles for that gene will be present in
each of their gametes?
a) 1
b) 2
c) 3
d) 4
44. Which mode of inheritance best describes the trait below?
Unaffected Male
Unaffected Female
Affected Male
Affected Female
a)
b)
c)
d)
Autosomal dominant
X-linked recessive
Autosomal recessive
Y-linked recessive
45. In hamsters, brown fur (B) is dominant to white fur (b), and straight fur (S) is dominant to
curly fur (s). If you buy a brown hamster with straight fur, what kind of cross could you
perform to determine its genotype?
a) A dihybrid cross with a homozygous brown and straight furred hamster
b) A test cross with a curly haired, white hamster
c) A test cross with another unknown hamster
d) A monohybrid cross with a white furred hamster
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam – revised version, December 2016
10
46. The alleles for flower colour and stem length segregate together. An unknown cross results
in 43% of the offspring having red flowers and a long stem, 44% white flowers and a short
stem, 7% red flowers and a short stem, and 6% white flowers and a long stem. Which
phenotypes are the parental phenotypes?
a) Red flowers and long stem, and white flowers and short stem
b) Red flowers and long stem, and white flowers and long stem
c) White flowers and short stem, and white flowers and long stem
d) None of the above
47. A cell is displaying the process of exocytosis when it is …
a) transporting molecules from the plasma membrane to the Golgi apparatus.
b) transporting molecules within vesicles to be taken into the cell.
c) transporting molecules within vesicles to be released outside the cell.
d) transporting molecules from the nucleus to the Rough Endoplasmic reticulum and
finally to the Golgi apparatus.
48. A missense mutation on an enzyme prevents it from binding to its substrate. Where on the
enzyme is this mutation?
a) Allosteric site
b) Lock site
c) Reaction site
d) Active site
49. Which of the following is not a eukaryotic-specific trait?
a) Phagocytosis
b) Multicellularity
c) Cell division
d) Endomembrane trafficking
50. Enzymes are needed in biological systems because:
a) they provide energy for reactions.
b) they slow down reactions to allow for control.
c) they speed up reactions that would otherwise occur too slowly.
d) they provide structure and support.
51. The purpose of fermentation in anaerobic organisms is to…
a) regenerate NAD+ for glycolysis.
b) regenerate NADH for glycolysis.
c) generate an ethanol intermediate for the TCA cycle.
d) generate a lactate intermediate for the TCA cycle.
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam – revised version, December 2016
52. Which of the following processes and products are incorrectly matched?
a) Cellular Respiration: H2O and CO2
b) Photosynthesis: O2
c) Cellular Respiration: Glucose and ATP
d) Photosynthesis: Sugars
53. Fertilization results in:
a) maternal inheritance of mitochondrial DNA.
b) a diploid zygote.
c) a cell with a new genetic combination.
d) All of these are correct
54. Phospholipids are structured such that…
a) the tails are hydrophobic and positioned towards the outside of the bilayer.
b) the tails are hydrophobic and positioned towards the inside of the bilayer.
c) the heads are hydrophobic and positioned towards the outside of the bilayer.
d) the heads are hydrophobic and positioned towards the inside of the bilayer.
55. In Drosophila, two genes, one for body colour and one for eye colour, are located on the
same chromosome. The wild type grey body colour (G) is dominant to black (g), and wildtype red eyes (R) are dominant to purple (r). You cross a fly with a grey body and red eyes
with a black bodied, purple eyed fly. 49% of the offspring have grey bodies and red eyes,
48% have black bodies and purple eyes, and 3% have either black bodies and red eyes or
grey bodies and purple eyes. Which of the following must be true?
a) Gr & gR are linked in the first parent and gr in the second
b) GR are linked in the first parent and gr in the second
c) GR & gr are linked in the first parent and gr in the second
d) gr is linked in both parents
56. From the above question, how far apart are the genes on the chromosome?
a) 48.5 map units
b) 3 map units
c) 97 map units
d) 6 map units
57. If you wanted to observe the external surface of cilia on a eukaryotic cell, which type of
microscopy would give the best image for surface details?
a) Scanning Electron Microscopy
b) Fluorescence Microscopy
c) Bright Field Microscopy
d) Transmission Electron Microscopy
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
11
Biology 120 Mock Final Exam – revised version, December 2016
12
58. In eukaryotes, the nucleus may contain ___________.
a) pores for transport through a single phospholipid bilayer
b) pores for transport through a double phospholipid bilayer
c) a nucleoid region that houses the DNA
d) a centriole
59. Which of the following best explains the difference in cellular division between prokaryotes
and eukaryotes?
a) Prokaryotic cells have no organelles to redistribute.
b) Eukaryotic cells have multiple chromosomes.
c) Prokaryotes only go through meiosis not mitosis.
d) Both a) and c)
e) Both a) and b)
60. Which of the following structures is found in cells of Archaea but not your liver?
a) Nucleoid
b) Nucleolus
c) Chloroplasts
d) Ribosomes
61. Colour-blindness is an X-linked recessive genetic trait. If your dad was colour blind but your
mom was not colour blind or a carrier, what would be the probability of you being colour
blind?
a) 0%
b) 50%
c) 25%
d) It depends on whether I am a boy or a girl
62. DNA polymerase:
a) adds a nucleotide diphosphate to the 3’ end of a DNA primer.
b) adds a nucleotide triphosphate to the 5’ end of a DNA primer.
c) adds a nucleotide triphosphate to the 3’ end of an RNA primer.
d) adds a nucleotide triphosphate to the 5’ end of an RNA primer.
63. The Calvin Cycle produces ___________, and is an ____________ reaction.
a) carbohydrates; endergonic
b) CO2; exergonic
c) carbohydrates; exergonic
d) CO2; endergonic
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam – revised version, December 2016
64. Which law of thermodynamics is also known as the Law of Conservation of Energy? What
does this law state?
a) The First Law; No system can be 100% efficient.
b) The First Law; The total amount of energy in a system and its surroundings does
not change.
c) The Second Law; No system can be 100% efficient.
d) The Second Law; The total amount of energy in a system is constant, but the
energy in the surroundings may change.
65. The enzymes required for DNA replication, in order, are:
a) Helicase, DNA polymerase, Primase, Ligase
b) Helicase, Ligase, DNA Polymerase, Primase
c) DNA Polymerase, Helicase, Primase, Ligase
d) Helicase, Primase, DNA Polymerase, Ligase
66. Which of the following differences between DNA and RNA are true?
a) DNA contains uracil, whereas RNA contains thymine
b) Only RNA has a free hydroxyl group on the 2’ carbon
c) DNA is usually single-stranded and RNA is usually double-stranded
d) None of the above are true
67. Which hypothesis did the Miller-Urey experiment provide evidence for?
a) The Clay Hypothesis
b) The Reducing Atmosphere Hypothesis
c) The Oparin-Haldane Hypothesis
d) Both b) and c)
68. The Smooth Endoplasmic Reticulum ____________:
a) is where the cell synthesizes proteins.
b) stores genetic material in the form of RNA.
c) is the site of lipid synthesis in the cell.
d) contains hydrolytic enzymes which digests old cellular parts.
e) plays light jazz to get cells in the mood to replicate.
69. Which of the following does NOT correctly describe microtubules?
a) Microtubules are made of actin dimers.
b) Microtubules associate with the motor proteins dynein and kinesin.
c) Microtubules form the centrioles in animal cells.
d) Microtubules are the largest of the eukaryotic cytoskeletal components.
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
13
Biology 120 Mock Final Exam – revised version, December 2016
14
70. Tropical countries experience much warmer temperatures than Saskatchewan does. How
might the membrane composition of a plant native to Jamaica differ from a native
Saskatchewan plant?
a) The Jamaican plant will likely have a higher proportion of saturated fatty acids in
its membrane phospholipids than the Saskatchewan plant.
b) The Jamaican plant will likely have a higher proportion of unsaturated fatty acids in
its membrane phospholipids than the Saskatchewan plant.
c) The Jamaican plant will likely have a higher proportion of cholesterol in its
membrane than the Saskatchewan plant will.
d) The Jamaican plant will likely have more temperature-regulating proteins in its
membrane than the Saskatchewan plant
71. The plasma membrane consists of:
a) a phospholipid bilayer.
b) embedded proteins.
c) cholesterol.
d) all of the above
72. All of the following statements regarding protobionts are true except:
a) They could have formed spontaneously without any input of energy.
b) They are the evolutionary precursors of prokaryotic cells.
c) They consist of organic molecules surrounded by a membrane-like structure.
d) They are considered very primitive organisms.
73. In glycolysis, _________ is used to produce _________ and _________.
a) 2 ADP; 4 ATP; 2 NADH
b) 2 ATP; 4 ATP; 2 NAD+
c) 2 ATP; 4 ATP; 2 NADH
d) 2 ADP; 4 ATP; 2 NAD+
74. Do all mRNA fragments contain a start codon?
a) No, because rRNA and tRNA do not code for proteins and therefore do not require
start codons
b) Yes, because mRNAs code for proteins and therefore require a start codon
c) Yes, because rRNA and tRNA code for proteins and therefore require a start codon
d) No, because mRNA does not code for protein and therefore does not need a start
codon
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam – revised version, December 2016
15
75. The result of completely conservative DNA replication would be:
a) One helix composed of newly synthesized strands and one composed of parental
strands.
b) Two helices each with one parental strand and one newly synthesized strand.
c) Two helices with mixed segments of parental and newly synthesized DNA.
d) One helix of parental DNA and two strands of newly synthesized mRNA.
76. In humans, the SRY protein is responsible for:
a) the production of female sexual characteristics.
b) the production of male sexual characteristics.
c) regulation of the SRY gene.
d) an overwhelming urge to constantly apologize.
77. Rubisco catalyzes _________ and is vital because ______________.
a) nitrogen fixation; it provides the source of organic nitrogen molecules necessary
for amino acid production
b) the fixation of CO2; it provides the source of organic carbon molecules for most of
the world’s organisms
c) phosphorylation of ADP; it synthesizes ATP
d) the fixation of CO2; otherwise CO2 would build up to toxic levels in the
atmosphere
78. Members of the bacterial genus Alicyclobacillus are called thermophiles, which means they
live in extreme high temperature environments, like hot springs and geysers. What is
thought to be the primary survival mechanism that allows them to live in such hot
environments?
a) Their plasma membranes contain large amounts of cholesterol, which helps
maintain the fluidity and integrity of their membranes.
b) They contain special structures that carry out endothermic reactions so as to
modulate their internal temperature.
c) Their enzymes have a high optimal temperature, which allows necessary metabolic
reactions to take place at high temperatures.
d) They are dormant and not considered true living organisms.
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam – revised version, December 2016
16
79. Genes x, y, and z are linked, with an 11% recombinant frequency between genes x and y, 7%
between x and z, and 4% between z and y. Which of the following linkage maps is correct?
a)
11 mu
z
y
7 mu
4 mu
x
b)
11 mu
y
x
4 mu
7 mu
z
c)
11 mu
x
7 mu
z
4 mu
y
d)
7 mu
x
11 mu
z
4 mu
y
80. In eukaryotes, the nucleus ___________:
a) stores most of the cell's genetic material in the form of linear DNA
b) allows for transport of material in and out of its nuclear envelope through many
small pores
c) may contain a structure called a nucleolus
d) all of the above
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam – revised version, December 2016
17
81. A non-functional allele for the LDL gene in flies is known to be incompletely dominant. If
you cross two flies, one homozygous for the functional allele and one homozygous for the
non-functional allele, their offspring will have:
a) normal LDL receptor production.
b) reduced LDL receptor production.
c) severely reduced LDL receptor production.
d) There is not enough information to make a conclusion.
82. How do enzymes catalyze reactions?
a) By lowering the activation energy
b) By increasing substrate concentration
c) By lowering substrate concentration
d) By contributing needed energy
83. Bruton’s agammaglobulinemia is a genetic disorder that affects far more men than women.
Which of the following is true?
a) It is likely caused by an allele found on an autosomal chromosome.
b) It is likely caused by a recessive allele found on a sex chromosome.
c) It is likely caused by a dominant allele found on a sex chromosome.
d) It is impossible to tell whether it is caused by an autosomal or sex linked gene.
84. In DNA replication, the ______________ strand grows ____________ away from the
replication fork.
a) Lagging strand, continuously
b) Lagging strand, discontinuously
c) Leading strand, continuously
d) Leading strand, discontinuously
85. All organisms in Kingdom Plantae have both of the following:
a) Contractile vacuoles and a plasma membrane.
b) A plasma membrane and plastids.
c) Centrioles and a nucleus.
d) Chloroplasts and lysosomes.
86. How does pesticide resistance develop?
a) The pesticide promotes the formation of an allele for pesticide resistance.
b) The pesticide kills organisms that are resistant, leaving only not resistant ones.
c) Over successive generations, the pesticide increases the frequency of the allele for
pesticide resistance.
d) None of the above
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam – revised version, December 2016
18
87. Which of the following correctly illustrates the central dogma?
a) RNA  Translation  DNA  Transcription Protein
b) RNA  Transcription  DNA  Translation Carbohydrate
c) DNA  Translation  RNA  Transcription Nucleotide
d) DNA Transcription  RNA  Translation  Protein
88. Which of the following is evidence that supports the endosymbiotic theory?
a) Mitochondria and chloroplasts have their own genome.
b) Mitochondria and chloroplasts have single bilayer membranes.
c) Chloroplasts and mitochondria are able to survive outside of the cell.
d) None of the above
89. Research shows that the gene for a newly-discovered genetic disease is located on an
autosome. Now researchers are using pedigrees to find out whether the allele for this gene
is dominant or recessive. What advice could you give to these researchers based on your
knowledge of patterns of inheritance?
a) If the disease is recessive, both parents must have at least one copy of the affected
allele for the offspring to have the disease.
b) If the disease is dominant, it cannot “skip” generations, at least one parent must
have the disease for the offspring to have the disease.
c) Males will be more likely to have the disease if it is recessive, and females will be
more likely to have it if it is dominant.
d) Both a) and b)
90. Chlorophyll appears green because:
a) it can only absorb energy in the form of green photons, which allows it to emit
green light.
b) it is unable to absorb green wavelengths, and thus green light is reflected.
c) it is a member of Rider nation.
d) it can only absorb energy in the form of blue and yellow photons, which combined
give off a green colour.
91. C. Botulinum is a bacterium that produces a toxin that causes botulism in humans. Most
cases of botulism occur when food is improperly canned, providing these bacteria with an
oxygen-free environment and a moist food source. C. botulinum is best classified as a(n):
a) facultative anaerobe.
b) obligate aerobe.
c) strict anaerobe.
d) photosynthetic aerobe.
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam – revised version, December 2016
19
92. A somatic animal cell contains 24 chromosomes. How many different ways could this
animal’s chromosomes be aligned along the metaphase plate during the first meiotic
division during the production of gametes?
a) 122
b) 242
c) 212
d) 224
93. Suppose you have 2 of the same kinds of plant, which produces pods containing seeds. One
of your plants has yellow seeds, and the other plant has blue seeds. You cross them, and get
offspring that have green seeds. What kind of inheritance does your plant likely follow?
a) Epistasis
b) Incomplete Dominance
c) Complete Dominance
d) Co-dominance
94. A crime scene investigator is given two samples of blood from a crime scene. Sample A is
from the arteries of the victim; Sample B is blood from the victim that was found mixed with
water from an unknown source. The red blood cells in Sample B were smaller than the cells
in Sample A. This indicates that the water was ____________ to the cell, so the water could
be from _____________.
a) Hypertonic; the ocean
b) Hypotonic; the ocean
c) Hypertonic; a freshwater lake
d) Hypotonic; a freshwater lake
95. Which of the following statements regarding semiautonomous organelles is false?
a) They cannot survive without the rest of the cell.
b) They cannot reproduce on their own.
c) They include mitochondria and chloroplasts.
d) They depend on other parts of the cell for their internal components.
96. In a dihybrid cross between two heterozygous flies, offspring occur in the proportion
9:3:3:1. Which of the following is true?
a) The genes are less than 25mu apart.
b) The genes assort independently.
c) The genes are more than 50mu apart.
d) b) and c)
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam – revised version, December 2016
20
97. Gene expression is the:
a) flow of information through generations.
b) fact that each individual of a species has a unique set of genes.
c) fact that individuals of the same species have different phenotypes.
d) process by which genetic information flows from genes to proteins.
98. Facultative and strict anaerobes differ in that:
a) facultative anaerobes require a steady oxygen supply, while strict anaerobes
require an oxygen-free environment.
b) there is no difference.
c) they use different methods of fermentation.
d) facultative anaerobes can function with or without oxygen, while strict anaerobes
can only function in the absence of oxygen.
99. Glycolysis occurs in:
a) Animalia
b) Eukaryota
c) Bacteria
d) All of the above
100.
Catabolic processes…
a) metabolize complex molecules to simpler molecular building blocks
b) are always endothermic reactions (+ΔH)
c) are always exothermic reactions (-ΔH)
d) Both a) and c)
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,