BIOD 102 EXAM SCRIPT UPDATED
COMPLETE QUESTIONS AND ANSWERS
EXPERT REVIEWED
●● 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 (T/F)
Answer: True
●● During elongation, in which direction are new nucleotides being
added to the leading strand?
Answer: 5' —> 3'
●● The leading strand requires ____ # of RNA primers, and the lagging
strand requires ____ # of 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 nucleotides that are erroneous. How does the polymerase
"know" a nucleotide is misplaced.
Answer: Newly adde nucleotides are compared to the complimentary
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
●● Genotype
Answer: Sequence of genetic information
●● Phenotype
Answer: Observable characteristics resulting from genotype.
●● Transcription
Answer: the process of synthesizing mRNA from a DNA template
●● Transcription
Answer: Process of interpreting mRNA to sequence of amino
acids/proteins
COMPLETE QUESTIONS AND ANSWERS
EXPERT REVIEWED
●● 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 (T/F)
Answer: True
●● During elongation, in which direction are new nucleotides being
added to the leading strand?
Answer: 5' —> 3'
●● The leading strand requires ____ # of RNA primers, and the lagging
strand requires ____ # of 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 nucleotides that are erroneous. How does the polymerase
"know" a nucleotide is misplaced.
Answer: Newly adde nucleotides are compared to the complimentary
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
●● Genotype
Answer: Sequence of genetic information
●● Phenotype
Answer: Observable characteristics resulting from genotype.
●● Transcription
Answer: the process of synthesizing mRNA from a DNA template
●● Transcription
Answer: Process of interpreting mRNA to sequence of amino
acids/proteins
