Nucleic Acids

Question: Nucleotide bases and aromatic amino acids absorb light respectively at
[A].

280 and 260 nm

[B].

260 and 280 nm

[C].

270 and 280 nm

[D].

260 and 270 nm

Answer: Option B

Explanation:

No answer description available for this question.

Question: Because DNA is a highly charged polyanion, its stability to heat denaturation
[A].

does not depend on hydrophobic interactions

[B].

increases with increasing salt

[C].

is independent of G – C content

[D].

decreases with increasing salt

Answer: Option B

Explanation:

No answer description available for this question.

Question: In gel electrophoresis, what fragments will move most quickly through a gel?
[A].

Large fragments

[B].

Small fragments

[C].

Large genome

[D].

None of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Nucleic acids can be analyzed experimentally by their
[A].

molecular weight

[B].

absorption of visible light

[C].

absorption of uv light

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Nucleoside is a pyrimidine or purine base
[A].

covalently bonded to a sugar

[B].

ionically bonded to a sugar

[C].

hydrogen bonded to a sugar

[D].

none of the above

Answer: Option A

Explanation:

No answer description available for this question.

Question: A five carbon sugar lacking a hydrogen at the number 2 carbon is found in
[A].

DNA

[B].

RNA

[C].

mRNA

[D].

rDNA

Answer: Option A

Explanation:

No answer description available for this question.

Question: A purine with an amine (NH2) group on the 6th carbon is
[A].

adenine

[B].

cytosine

[C].

thymine

[D].

guanine

Answer: Option A

Explanation:

No answer description available for this question.

Question: A nucleotide consists of
[A].

a sugar, a base and a phosphate

[B].

a sugar and a phosphate

[C].

paired bases

[D].

a sugar, a base and three phosphates

Answer: Option A

Explanation:

No answer description available for this question.