Biochemistry

Question: DNA with a G-C content of 50% will melt at approximately
[A].

60°C

[B].

70 °C

[C].

90 °C

[D].

100 °C

Answer: Option C

Explanation:

No answer description available for this question.

Question: The B-DNA structure found in solution is a
[A].

left-handed double helix of antiparallel chains (10 bp/turn)

[B].

right-handed double helix of antiparallel chains (∼10 bp/turn)

[C].

left-handed zig-zag helix of antiparallel chains (10 bp/turn)

[D].

right-handed double helix of parallel chains (∼10 bp/turn)

Answer: Option B

Explanation:

No answer description available for this question.

Question: In DNA, there are
[A].

five bases known as adenine, guanine, thymine, tryptophan and cytosine

[B].

four bases known as adenine, guanine, thymine and cytosine

[C].

three bases known as adenine, guanine and cytosine

[D].

only two bases known as adenine and cytosine

Answer: Option B

Explanation:

No answer description available for this question.

Question: Number of times the two DNA strands are interwined in circular DNA and is known as
[A].

helix frequency

[B].

linking number

[C].

twisting number

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Who’s X-ray work aided Watson and Crick in their discovery of the double helix?
[A].

W.H. Bragg

[B].

R. Franklin

[C].

L. Pauling

[D].

Leaderberg

Answer: Option B

Explanation:

No answer description available for this question.

Question: In an agarose gel, DNA is moving from
[A].

cathode to anode

[B].

left to right

[C].

anode to cathode

[D].

A to B

Answer: Option A

Explanation:

No answer description available for this question.

Question: First evident that DNA is genetic material comes from the experiment of Griffith is
[A].

transduction

[B].

transformation

[C].

replication

[D].

translation

Answer: Option B

Explanation:

No answer description available for this question.

Question: Which of the following would not contain DNA?
[A].

Yeast

[B].

Bacteria

[C].

Glass crystals

[D].

Mold

Answer: Option C

Explanation:

No answer description available for this question.