Download Biol120 Mock Final Examination (v2.0)

The Biol120 Peer Mentors and the University Learning Centre Present:
Biol120 Mock Final Examination (v2.0)
Practice Question for your own studying
Important note: This mock final exam was written by your Biology 120 Peer Mentors, not
your professors! It is designed to help you test yourself on topics and concepts covered in
class but should not be considered an exact preview of the final exam.
1. The plant cell wall is made of:
a) Chitin
b) Cellulose
c) Phospholipids
d) Proteins
2. Which of the following is TRUE about DNA structure?
a) Has a backbone with a slight positive charge.
b) Each “rung” has a pair of purines hydrogen bonded or a pair pyrimidines hydrogen
bonded.
c) The two strands of the helix are arranged in parallel.
d) None of the above.
3. Which of the following is NOT a product of the light reactions of photosynthesis?
a) Oxygen
b) ATP
c) NADPH
d) Sugar
4. If your dad was colour blind but your mom wasn’t colour blind or a carrier, what would be
the odds of you being colour blind? (Hint: colour-blindness is a recessive X-linked trait)
a) 0%
b) 50%
c) 25%
d) Need more information
5. How do enzymes catalyze reactions?
a) By lowering the activation energy
b) By increasing substrate concentration
c) By lowering substrate concentration
d) By contributing energy to the reaction
Questions and answers for the mock final exam will be posted after Wednesday Dec. 3, 2014 at:
http://www.usask.ca/ulc/sss, as well as to your blackboard course. 6. Which of the following concerning Photosynthesis and/or Cellular Respiration are
incorrectly matched?
a) Cellular Respiration products: H2O and CO2
b) Photosynthesis products: O2 and Sugars
c) Cellular Respiration reactants: Glucose and H2O
d) Photosynthesis reactants: H2O and CO2
7. DNA polymerase works by
a) Adding a nucleotide triphosphate to the 3’ end of a DNA primer made by primase.
b) Adding a nucleotide triphosphate to the 5’ end of a DNA primer made by primase.
c) Adding a nucleotide triphosphate to the 3’ end of an RNA primer made by primase.
d) Adding a nucleotide triphosphate to the 5’ end of an RNA primer made by primase.
8. A major effect of the rise in cyanobacteria 2.5 billion years ago was…
a) The accumulation of O2 in the atmosphere
b) The widespread use of H2O as an electron donor for photosynthesis
c) Formation of banded iron deposits
d) All of the above
9. Sickle cell disease is a complex disease caused by a single mutation in one gene, thus
we say it demonstrates:
a) Epistasis
b) A sex-linked gene
c) Pleiotropy
d) Pigmentation
10.
Gametes produced by a diploid organism are generally:
a) diploid
b) haploid
c) produced by mitosis
d) only produced in animals
11. What is needed at the start codon for translation to start?
a) Methionine amino-acyl tRNA
b) A ribosome, both large and small subunits, and a methionine amino-acyl tRNA
c) A ribosome, both large a small subunits
d) A ribosome, both large and small subunits, and a cysteine amino-acyl tRNA
12. The plasma membrane of a typical animal cell consists of:
a) a phospholipid bilayer
b) embedded proteins
c) cholesterol
d) all of the above
Questions and answers for the mock final exam will be posted after Wednesday Dec. 3, 2014 at:
http://www.usask.ca/ulc/sss, as well as to your blackboard course. 13. Rubisco catalyzes _________ and is vital because ______________.
a) Nitrogen fixation; it provides the source of organic carbon molecules for most of the
world’s organisms.
b) The fixation of CO2; it provides the source of organic carbon molecules for most of
the world’s organisms.
c) Phosphorylation of ADP; synthesizes ATP
d) None of the above
14. Why is glucose an excellent fuel molecule?
a) It is found in many foods that we eat.
b) It is strongly electronegative.
c) It is an unbranched chain.
d) Electrons are easily removed from it.
15. What is the final product of the Calvin Cycle and, energetically how would you classify the
set of reactions?
a) carbohydrate; endergonic
b) CO2; exergonic
c) carbohydrate; exergonic
d) CO2; endergonic
16. Production of one molecule of 3-phosphglyceraldehyde requires how many CO2
molecules to be fixed by Rubisco?
a) 3
b) 1
c) 6
d) None of the above
17. Which of the following statements is incorrect:
a) Mendel’s findings were not acknowledged until after his death.
b) Polygenic inheritance is where one gene affects more than one character of an
organism.
c) Many genes may have multiple alleles when considering individuals in a population.
d) All of the following are correct.
18. When fermentation occurs in animals, pyruvate is converted to ______, but when it occurs
in yeasts, pyruvate is converted to _____.
a) alcohol, lactate
b) acetyl-CoA, alcohol
c) lactate, alcohol
d) alcohol, alcohol
Questions and answers for the mock final exam will be posted after Wednesday Dec. 3, 2014 at:
http://www.usask.ca/ulc/sss, as well as to your blackboard course. 19. There are 4 alleles for a given gene and an individual is heterozygous for that gene. How
many alleles for that gene will he/she possess in each of their gametes?
a) 1
b) 2
c) 3
d) 4
20. What is/are the fate(s) of electrons in a pigment being raised to a higher energy level or
excited state?
a) Energy loss to environment
b) Transfer of energy
c) Oxidation of the pigment
d) All of the above
21. 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
22. According to Mendel’s laws, in a monohybrid cross between a homozygous dominant
and a homozygous recessive individual the expected phenotype ratio of the F2 generation
would be:
a) 9:3:3:1
b) 3:1
c) 9:3:4
d) 1:1
23. A nucleic acid was analysed for its nucleotides and found to contain 12 percent A, 24
percent T, 24 Percent G, and 40 percent C. The nucleic acid must be which of the
following?
a) A double stranded DNA molecule
b) A double stranded RNA molecule
c) A single stranded DNA molecule
d) A single stranded RNA molecule
24. What are the outcomes of a silent mutation?
a) Multiple amino acid alterations
b) A single amino acid alteration
c) A premature stop codon and the end of the polypeptide chain
d) No change in the amino acid sequence at all
Questions and answers for the mock final exam will be posted after Wednesday Dec. 3, 2014 at:
http://www.usask.ca/ulc/sss, as well as to your blackboard course. 25. Which of the following is a reason why Mendel used Pea plants as a model organism
when conducting research on genetics?
a) Easily identified morphological traits
b) When crossing heterozygous peas a variety of phenotypes can be produced
c) He could grow them in his garden
d) All of the above
26. An amoeba traps its prey in a vesicle before digesting it. This process is known as:
a) Exocytosis
b) Pinocytosis
c) Phagocytosis
d) None of the Above
27. During cellular respiration, by the end of the citric acid cycle, the six carbons from glucose
(used in glycolysis) have all been:
a) Lost from the cell
b) Converted to two three-carbon pyruvate molecules
c) Converted to CO2
d) Used to make acetyl-CoA
28. How many molecules of ATP can one molecule of NADH make in the Electron Transport
Chain?
a) none
b) 1 molecule of ATP
c) 3 molecules of ATP
d) 38 molecules of ATP
29. Light is required for the light dependent reactions because:
a) It is the source for electrons
b) It splits the water molecule
c) It energizes electrons in the reaction center
d) None of the above
30. Which of the following does NOT correctly describe microtubules?
a) made of actin dimers
b) associates with the motor proteins Dynein and Kinesin
c) form the centrioles in animal cells
d) is the largest in size of the eukaryotic cytoskeletal components
Questions and answers for the mock final exam will be posted after Wednesday Dec. 3, 2014 at:
http://www.usask.ca/ulc/sss, as well as to your blackboard course. 31. The biggest difference between facultative anaerobes and strict anaerobes is:
a) facultative anaerobes must have a steady oxygen supply, while strict aerobes
require an oxygen-free environment.
b) there is no difference, they are exactly the same.
c) facultative anaerobes use a special kind of fermentation.
d) facultative anaerobes can function with and without oxygen, while strict anaerobes
can only function in the absence of oxygen.
32. You cross two flies that are heterozygous for two genes and find that the phenotypic ratios
of their offspring occur in the proportion 9:3:3:1. Does this mean they are independently
assorted?
a) Yes, they are definitely independently assorted
b) No, they are definitely not independently assorted
c) They may be independently sorted, but the genes may also be less than 25mu apart
on the same chromosome
d) They may be independently sorted, but the genes may also be over 50mu apart on
the same chromosome
33. What are the 2 mechanisms that mitotic spindles use to move chromosomes?
a) Spindle mid-point and kinetochore microtubules
b) Non-kinetochore microtubules and kinetochore microtubules
c) Hormones and centromere
d) None of the above
34. The citric acid cycle yields:
a) NAD+, FAD, ADP
b) CO2, NADH, FADH2, ATP
c) CO2, NADH, acetyl-CoA
d) ATP
35. A cell’s DNA has multiple origins of replication (ori sites). The cell is most likely:
a) Prokaryotic
b) Eukaryotic
c) Both A or B
d) None of the above; no organism can have multiple ori sites.
Questions and answers for the mock final exam will be posted after Wednesday Dec. 3, 2014 at:
http://www.usask.ca/ulc/sss, as well as to your blackboard course. 36. ATP Synthase…
a) Directly synthesizes ATP by movement of protons up a concentration gradient.
b) Directly synthesizes ATP by movement of protons down a concentration gradient.
c) Directly synthesizes ATP by movement of electrons from NADH up a concentration
gradient.
d) Directly synthesizes ATP by movement of electrons from NADH down a
concentration gradient.
37. A non-functional allele for the gene for LDL receptor production is known to be
incompletely dominant. If you cross two flies, one homozygous dominant and one
homozygous recessive, and test their male offspring, they will it have:
a) Normal LDL receptor production
b) Reduced LDL receptor production
c) Severely reduced LDL receptor production
d) No idea
38. If DNA replication followed the dispersive theory of replication, the hypothetical result
would be:
a) Two DNA helices, one helix composed of newly synthesized strands and one
composed of the old parental strands.
b) Two DNA helices, each helix with one old parental strand and one newly
synthesized daughter strand.
c) Two DNA helices, each helix with mixed segments of the old parental DNA and
newly synthesized DNA in both strands.
d) One DNA helix of old parental strands and one newly synthesized RNA daughter
strand.
39. In the Calvin Cycle three molecules of _____ are fixed to synthesize______ molecules
of G3P (a triose phosphate).
a) ATP, one
b) ATP, three
c) CO2, one
d) CO2, three
40. As the electrons flow through the Electron Transfer Chain, the electronegativity of the
electron acceptors:
a) increases, ensuring that the energy flows from high to low down the chain.
b) increases, ensuring that the energy flows from low to high down the chain.
c) decreases, ensuring that the energy flows from low to high down the chain.
d) stays the same all the way down the chain.
Questions and answers for the mock final exam will be posted after Wednesday Dec. 3, 2014 at:
http://www.usask.ca/ulc/sss, as well as to your blackboard course. 41.
In what stage does crossing over occur in meiosis
a) Metaphase II
b) Anaphase I
c) Prophase I
d) Telophase II
42. What are the major products from photosynthesis that are used to perform carbon
fixation during the Calvin Cycle?
a) NADPH and ATP
b) NADP+ and ATP
c) NADP+ and ADP
d) Electrons and Hydronium Ions
43. In which of the following is structure and function matched incorrectly?
a) Thylakoids, light absorption by chlorophylls and carotenoids
b) Thylakoids, Calvin cycle
c) Thylakoids, electron transport
d) Thylakoids, ATP synthesis by ATP synthase
44. Which of the following is NOT a fundamental mechanism of enzyme action?
a) Bringing the reactant molecules together
b) Etherification of the ligand
c) Exposing the reactant molecule to altered charge environments
d) Changing the shape of the substrate molecule
Questions and answers for the mock final exam will be posted after Wednesday Dec. 3, 2014 at:
http://www.usask.ca/ulc/sss, as well as to your blackboard course. Biol120 Mock Final Examination
V2.0 ANSWERS
1. b
2. d
3. d
4. a
5. a
6. c
7. c
8. d
9. c
10. b
11. b
12. d
13. b
14. d
15. a
16. a
17. b
18. c
19. a
20. d
28. c
29. c
30. a
31. d
32. d
33. b
34. b
35. b
36. b
37. b
38. c
39. c
40. a
41. c
42. a
43. b
44. b
21. d
22. b
23. c
24. d
25. d
26. c
27. c
Questions and answers for the mock final exam will be posted after Wednesday Dec. 3, 2014 at:
http://www.usask.ca/ulc/sss, as well as to your blackboard course.