UNIT 6 (DNA) REVIEW QUESTIONS
1) DNA can make exact copies of itself through replication because
the nitrogen bases ALWAYS pair
A) a-t and c-g
C)
B)
a-u and c-g
D)
a-c and t-g
c-g and t-u
2) Given the sequence of DNA nucleotide bases TTAGCCTTG, give the complementary strand of mRNA produced during
transcription.
A) AAAAAAAHH
C) AAUCGGAAC
B) AAGGUAGUA
D) AAUTGCCTA
3) Which amino acid sequence corresponds with the polypeptide strand AUG CCG UAC GAG UAA? Do not include
the start and stop codons.
A)
arginine serine glycine
B)
proline phenylalanine aspartic
C)
proline tyrosine glutamic acid
D)
arginine tyrosine glutamic acid
4) All of the statements EXCEPT one are true about mutations. Which statement is false?
A)
Mutations must be present in parents and then passed to offspring.
B)
Mutations can be positive and produce organisms with improved traits.
C)
Mutations can be fatal to the organism that has a mutation, if the mutation is in a critical
gene.
D)
Mutations can be silent, and not affect the organism that has them, if the mutation is in a
non-critical area.
5) Each of these four organisms began life as a single 2N cell. Cells in each organisms divided and differentiated. Probably
the single most important process that ensured genetic continuity in all four organisms was DNA
A)
alliteration.
B)
replication.
C)
transcription.
D)
translation.
UNIT 6 (DNA) REVIEW QUESTIONS
6) Penicillin is an antibiotic that was discovered in
1928. Today, many species of bacteria have acquired
resistance to penicillin. This adaptation occurred as
the result of
A)
mutualism.
B)
symbiosis.
C)
genetic mutation.
D)
divergent evolution.
7) Some mutations always occur from generation to generation. But most mutations do not persist over time in the
gene pool. Which mutation is MOST likely to become established and persist in a species?
A)
a mutation that changes the color of a fruit fly’s eyes
B)
a mutation that makes it harder for a frog to catch food
C)
a mutation that helps a rabbit conceal itself from predators
D)
a mutation that causes a leopard attack humans more frequently
8) Chromosomes, which contain DNA, have several functions. All BUT ONE of these statements is a function of
chromosomes.
A)
Chromosomes determine the traits of an organism.
B)
Chromosomes provide instructions to make proteins.
C)
Chromosomes determine the gender of an individual.
D)
Chromosomes help an organism produce usable energy.
9) What is the function of the structure indicated by the arrow?
A)
It oxidizes food to provide energy for the cell.
B)
It contains the cell’s DNA and controls cell processes.
C)
It serves as a site for protein synthesis and modification.
D)
It is the site of synthesis of both white and red blood cells.
10) If the green nitrogen base in the DNA model represents adenine, the blue nitrogen base COULD represent
A)
adenine
B)
guanine
C)
thymine
D)
uracil
UNIT 6 (DNA) REVIEW QUESTIONS
Answer Key:
1.
A
2. C
3. C
4. A
5. B
6. C
7. C
8. D
9. B
10. B