Download 2nd Nine Weeks Exam Review Unit 5

Biology 2nd Nine Weeks Exam Review: Unit 5
Name:__________________________
Date:__________________
The mold Aspergillus flavus grows on grain. A. flavus produces a toxin that binds to the DNA in the bodies of
animals that eat the grain. The binding of the toxin to DNA blocks transcription, so it directly interferes with the
ability of an animal cell to do which of the following?
A. Transport glucose across the cell membrane into the cytoplasm.
B. Construct proteins as the tRNA carries amino acids to the ribosome.
C. Send instructions on the mRNA from the nucleus to the ribosomes.
D. Transfer proteins from the ER to the golgi bodies of the cell.
A portion of DNA undergoes a mutation as shown ACCTGT  AGTCCT. Which best describes what change
would occur in the protein?
A. Trp—Thr changed to Ser—Gly
B. Trp—Thr changed to Ser—Pro
C. hr—Cys changed to Ser—Pro
D. No change in amino acids would occur.
DNA can be changed by UV radiation. If the sun damages skin cells what is most likely to occur?
A. A somatic mutation that will not affect offspring.
B. A somatic mutation that could also affect the offspring.
C. A germ cell mutation with no effect on the individual’s body cells.
D. A germ cell mutation which will also affect the individual’s body cells.
This molecule is the building block of nucleic acids. It is called…
A. Amino acid
C. Nucleotide
B. Nucleic acid
D. Polysaccharide
Which best describes how RNA is made?
A. During replication just before the cell divides.
B. During transcription in the nucleus then it goes to ribosomes
C. During translation in the ribosomes then it goes to nucleus
D. During replication in the nucleus then it goes to ribosomes
What part of the cell does mRNA attach to?
A. Cell membrane
B. Ribosome
C. Nucleus
D. Thylakoids
The amount of Guanine in a person will always
equal the amount of…
A. Adenine
B. Cytosine
C. Thymine
D. Uracil
Naomi adds cycloheximide to cells grown in a test tube. Within minutes, she identifies short incomplete segments of
proteins in the cells. On which organelle does cycloheximide act?
A. ER
C. Nucleus
B. Golgi apparatus
D. Ribosomes
DNA and RNA have many structural similarities. Which structure in DNA and RNA is similar?
A. Purine bases (G & A)
C. Type of sugar
B. Pyrimidine bases (C & T)
D. Attached proteins
Biology 2nd Nine Weeks Exam Review: Unit 5
The anticodons for the
tRNA strand are below. What would
the complementary mRNA strand be…
Anti-Codon: GAGCUUGCACAU
A.
B.
C.
D.
GAG—UUC—ACG—AAG
GAG—TTC—ACG—AAG
CUC—GAA—CGU—GUA
CUU—CGU—GAA—CUC
Use the codon chart to answer questions.
What are the amino acids coded for
by the piece of mRNA shown in the question above?
A. Leu—Glu—Arg—Val
B. Val—Asp—Pro—His
C. Leu—Glu—Arg—Leu
D. Glu—Leu—Ala—Glu
Suppose you have a protein containing the
following sequence of amino acids:
Ser—Glu—His—Asp—Ala
Use the codon chart to determine which of the possible answers
contains a DNA sequence that codes for this amino acid
sequence.
A. ATAGGGCTTTAAACA
C. AGCGTTGTACTGCGA
B. AUGGGUCUAUAUACG
D. ATGGGTCTATATACG
What is the RNA sequence for a section of protein composed of Tyr—Val—His?
A. UAU—GCC—AGU
C. UAU—CUG---UAC
B. UAU—GUC—CAC
D. UAU—GCU—CAA
What mRNA will be transcribed from the following DNA sequence?
TTGCAGACCTA
A. TTGCAGACCTA
C. UUCGACAGGUA
B. AACGTCTGGAT
D. AACGUCUGGAU
What is the part labeled A?
A. Anticodon
B. Amino acid chain
What is the part labeled B?
A. Anticodon
B. Amino acid chain
What is the part labeled C?
A. Anticodon
B. Amino acid chain
A
C. Codon
D. tRNA
B
C. Codon
D. tRNA
C. Codon
D. tRNA
C
Biology 2nd Nine Weeks Exam Review: Unit 5
During DNA replication, a complementary strand of DNA is made for each original DNA strand. If a portion of the
original strand is TCAGAA, then the new strand that bonds with it would be…
A. UCGGAA
C. ACGGTT
B. AGTCTT
D. AGCCUU
Genetic information usually flows in one specific direction. Which of the following best represents this flow?
A. DNARNAProtein
C. RNAProteinDNA
B. ProteinRNADNA
D. DNAProteinRNA
Which of the following is matched up incorrectly?
A. Mitosis—Division of the nucleus
B. Replication—When a DNA is copied in the nucleus
C. Transcription---When a strand of mRNA us made from a portion of DNA and then leaves the nucleus
D. Translation—When RNA helps make an amino acid chain outside of the nucleus at the ribosome
E. ALL OF THE ABOVE ARE CORRECTLY MATCHED
What combines with a sugar and a phosphate group to form a nucleotide?
A. Amino acid
C. Nitrogenous base
B. Deoxyribose
D. Glycerol
Despite the diversity of nature, most organisms contain the same 4 DNA bases. This table shows the DNA
composition of 3 organisms as reported in a classic 1950s experiment.
Organism
Human
Wheat Germ
E. coli
Adenine (A)
29
27
25
Base Composition (percent)
Guanine (G)
Thymine (T)
21
29
23
27
25
25
Cytosine (C)
21
23
25
Based on this study, what did scientists conclude about the DNA composition of all organisms?
A. A, G, T, & C occur in equal percentages.
B. A & G occur in equal percentages and T & C occur in equal percentages.
C. A & T occur in equal percentages and G & C occur in equal percentages.
D. A & C occur in equal percentages and T & G occur in equal percentages.