BIOD 102 EXAM 1 QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
Replication of DNA begins at a single origin of replication and then proceeds
the entire length of the strand, in one direction. (True/False)
Answer: False.
What enzyme is responsible for relieving the stress associated with the
twisting and untwisting of a DNA strand during replication?
Answer: Topoisomerase.
As a replicated DNA strand elongates, what enzyme is responsible for adding
nucleotides?
Answer: DNA polymerase.
The energy required to add a nucleotide to a growing chain is supplied by an
exergonic reaction involving the hydrolysis of the nucleotide's pyrophosphate
tail. (True/False)
Answer: True.
During elongation, in which direction are new nucleotides being added to the
leading strand?
Answer: 5' → 3'.
The leading strand requires ____ RNA primers, and the lagging strand
requires ____ RNA primers.
, Answer: One; more than one.
What replaces RNA nucleotides with DNA nucleotides in a newly synthesized
strand?
Answer: DNA polymerase.
A class of DNA polymerase patrols newly added nucleotides and will remove
erroneous ones. How does the polymerase "know" a nucleotide is misplaced?
Answer: Newly added nucleotides are compared to the complementary
template strand.
Mismatch repair is the process of identifying nucleotides that are inappropriately
matched, such as guanine with a thymine, and removes the incorrect nucleotide
from the newly synthesized strand (t/f) -ANSWER✔✔True
Nucleotide excision repair (cutting DNA) is accomplished by what enzyme? -
ANSWER✔✔Nucleases
Telomeres contain a large proportion of vital coding DNA (T/F) -
ANSWER✔✔False
What cells of the body are shielded from telomere shortening? -
ANSWER✔✔Germ cells
Telomerase activity in somatic cells has implications for: -ANSWER✔✔Cancer
Gene -ANSWER✔✔Unit of hereditary composed of DNA; passed from parent to
offspring
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
Replication of DNA begins at a single origin of replication and then proceeds
the entire length of the strand, in one direction. (True/False)
Answer: False.
What enzyme is responsible for relieving the stress associated with the
twisting and untwisting of a DNA strand during replication?
Answer: Topoisomerase.
As a replicated DNA strand elongates, what enzyme is responsible for adding
nucleotides?
Answer: DNA polymerase.
The energy required to add a nucleotide to a growing chain is supplied by an
exergonic reaction involving the hydrolysis of the nucleotide's pyrophosphate
tail. (True/False)
Answer: True.
During elongation, in which direction are new nucleotides being added to the
leading strand?
Answer: 5' → 3'.
The leading strand requires ____ RNA primers, and the lagging strand
requires ____ RNA primers.
, Answer: One; more than one.
What replaces RNA nucleotides with DNA nucleotides in a newly synthesized
strand?
Answer: DNA polymerase.
A class of DNA polymerase patrols newly added nucleotides and will remove
erroneous ones. How does the polymerase "know" a nucleotide is misplaced?
Answer: Newly added nucleotides are compared to the complementary
template strand.
Mismatch repair is the process of identifying nucleotides that are inappropriately
matched, such as guanine with a thymine, and removes the incorrect nucleotide
from the newly synthesized strand (t/f) -ANSWER✔✔True
Nucleotide excision repair (cutting DNA) is accomplished by what enzyme? -
ANSWER✔✔Nucleases
Telomeres contain a large proportion of vital coding DNA (T/F) -
ANSWER✔✔False
What cells of the body are shielded from telomere shortening? -
ANSWER✔✔Germ cells
Telomerase activity in somatic cells has implications for: -ANSWER✔✔Cancer
Gene -ANSWER✔✔Unit of hereditary composed of DNA; passed from parent to
offspring
