BIOL 4003 Exam 2 questions with
verified answers
In order to function as genetic material, what are the functions that genetic material must
possess? - ANS ✔✔Store Information, transmission, replication, and variation.
In the experiment of Avery, McLeod, and McCarty, what was the effect when RNase or protease
was added to the DNA extract? - ANS ✔✔It allowed the conversion of type R into type S
bacteria.
Which of the following could be the components of a nucleotide found within a DNA strand? -
ANS ✔✔deoxyribose, thymine, and phosphate
The nucleotides within a single DNA strand are attached to each other via - ANS ✔✔a covalent
bond between a 5' phosphate and a 3' OH group
Which of the following is not found in a eukaryotic chromosome? - ANS ✔✔one origin of
replication (the following are found: many genes, one centromere, and some repetitive
sequences)
Bacterial chromosomes become more compact by - ANS ✔✔forming loop domains and DNA
supercoiling.
In eukaryotes, site within the cell nucleus that is occupied by a single chromosome is a - ANS
✔✔chromosome territory
When comparing the yeast genome (a simple eukaryote) to the human genome (a complex
eukaryote), why is the human genome so much larger? - ANS ✔✔Both a. and b. are correct.
, a. The human genome has more genes
b. the human genome has more repetitive DNA
(the human genome does NOT have more G's and C's compared to A's and T's)
In a DNA strand, a phosphate connects a 3' carbon atom in one deoxyribose to - ANS ✔✔a 5'
carbon in an adjacent deoxyribose
Positive supercoiling can - ANS ✔✔make a segment of DNA more compact
(it does not enhance the expression of genes or enhance the replication of DNA)
A chromosome territory is a region - ANS ✔✔in a cell nucleus that is occupied by a single
chromosome.
What are the expected results of the Meselson and Stahl experiment after 3 generations (i.e. 3
rounds of DNA replication in the presence of light nitrogen)? note: during generation zero, the
DNA is all heavy, and subsequent generations only make light DNA. - ANS ✔✔1/4 half heavy,
3/4 light
(G1: all half-heavy; G2: 1/2 half-heavy, 1/2 light; G3: 1/4 half-heavy, 3/4 light)
If DNA polymerase was not processive, DNA replication would occur - ANS ✔✔more slowly
During proofreading, DNA polymerase recognizes a mismatch and - ANS ✔✔removes
nucleotides from newly made strand in the 3' to 5' direction
The following statements below concern DNA replication. One of them is not true. Which is the
false statement? - ANS ✔✔A DNA double helix may contain two strands of DNA that were made
at the same time.
verified answers
In order to function as genetic material, what are the functions that genetic material must
possess? - ANS ✔✔Store Information, transmission, replication, and variation.
In the experiment of Avery, McLeod, and McCarty, what was the effect when RNase or protease
was added to the DNA extract? - ANS ✔✔It allowed the conversion of type R into type S
bacteria.
Which of the following could be the components of a nucleotide found within a DNA strand? -
ANS ✔✔deoxyribose, thymine, and phosphate
The nucleotides within a single DNA strand are attached to each other via - ANS ✔✔a covalent
bond between a 5' phosphate and a 3' OH group
Which of the following is not found in a eukaryotic chromosome? - ANS ✔✔one origin of
replication (the following are found: many genes, one centromere, and some repetitive
sequences)
Bacterial chromosomes become more compact by - ANS ✔✔forming loop domains and DNA
supercoiling.
In eukaryotes, site within the cell nucleus that is occupied by a single chromosome is a - ANS
✔✔chromosome territory
When comparing the yeast genome (a simple eukaryote) to the human genome (a complex
eukaryote), why is the human genome so much larger? - ANS ✔✔Both a. and b. are correct.
, a. The human genome has more genes
b. the human genome has more repetitive DNA
(the human genome does NOT have more G's and C's compared to A's and T's)
In a DNA strand, a phosphate connects a 3' carbon atom in one deoxyribose to - ANS ✔✔a 5'
carbon in an adjacent deoxyribose
Positive supercoiling can - ANS ✔✔make a segment of DNA more compact
(it does not enhance the expression of genes or enhance the replication of DNA)
A chromosome territory is a region - ANS ✔✔in a cell nucleus that is occupied by a single
chromosome.
What are the expected results of the Meselson and Stahl experiment after 3 generations (i.e. 3
rounds of DNA replication in the presence of light nitrogen)? note: during generation zero, the
DNA is all heavy, and subsequent generations only make light DNA. - ANS ✔✔1/4 half heavy,
3/4 light
(G1: all half-heavy; G2: 1/2 half-heavy, 1/2 light; G3: 1/4 half-heavy, 3/4 light)
If DNA polymerase was not processive, DNA replication would occur - ANS ✔✔more slowly
During proofreading, DNA polymerase recognizes a mismatch and - ANS ✔✔removes
nucleotides from newly made strand in the 3' to 5' direction
The following statements below concern DNA replication. One of them is not true. Which is the
false statement? - ANS ✔✔A DNA double helix may contain two strands of DNA that were made
at the same time.
