DNA Structure and Replication

Question: Okazaki fragments occur on the __________ and are bonded together by __________
[A].

Leading strand, polymerase

[B].

mRNA, anticodons

[C].

Lagging strand, ligase

[D].

tRNA, polymerase

Answer: Option C

Explanation:

No answer description available for this question.

Question: Overwinding or overtightening of DNA during replication is caused and removed by
[A].

DNAb, DNA polymerase

[B].

DNAa, gyrase

[C].

DNAb, gyrase

[D].

Single stranded protein, DNAa

Answer: Option C

Explanation:

No answer description available for this question.

Question: Klenow fragment without free nucleotides exhibits
[A].

exonuclease activity

[B].

endonuclease activity

[C].

nickase activity

[D].

no activity

Answer: Option A

Explanation:

No answer description available for this question.

Question: Okazaki fragments occur during
[A].

transformation

[B].

replication

[C].

polymerase reaction

[D].

synthesis

Answer: Option B

Explanation:

No answer description available for this question.

Question: Enzyme, responsible for proofreading base pairing is
[A].

DNA polymerase

[B].

Telomerase

[C].

Primase

[D].

DNA ligase

Answer: Option A

Explanation:

No answer description available for this question.

Question: DNA replication takes place in which direction?
[A].

3′ to 5′

[B].

5 ‘to 3’

[C].

Randomly

[D].

Vary from organism to organism

Answer: Option B

Explanation:

No answer description available for this question.

Question: Enzymes, responsible for unraveling short segments of DNA is
[A].

DNA polymerase

[B].

helicase

[C].

DNA ligase

[D].

primase

Answer: Option B

Explanation:

No answer description available for this question.

Question: One hypothesis of DNA replication suggested that the parental DNA molecules are broken into fragments. Both strands of DNA in each of the daughter molecules are made up of an assortment of parental and new DNA. This statement refers to which hypothesis?
[A].

Conservative theory

[B].

Dispersive theory

[C].

Semi-conservative theory

[D].

Evolutionary theory

Answer: Option B

Explanation:

No answer description available for this question.

Question: In a typical electrophoresis experiment, larger fragments of DNA move more
[A].

slowly, so they appear nearer the top of a gel photograph

[B].

quickly, so they appear nearer the top of a gel photograph

[C].

slowly, so they appear nearer the bottom of a gel photograph

[D].

quickly, so they appear nearer the bottom of a gel photograph

Answer: Option A

Explanation:

No answer description available for this question.

Question: DNA segments capable of moving from one place in the genome to another is known as
[A].

transposons

[B].

retrovirus

[C].

introns

[D].

moving elements

Answer: Option A

Explanation:

No answer description available for this question.