Biotechnology: Principles and Processes

NEET Biology · 64 questions · Page 7 of 7 · Click an option or "Show Solution" to reveal answer

Q61

Gel electrophoresis is used for

A cutting of DNA into fragments

B separation of DNA fragments according to their size

C construction of recombinant DNA by joining with cloning vectors

D isolation of DNA molecule

Correct Answer

Option B

Solution

(b) Gel electrophoresis separates DNA fragments according to their size.

Q62

The DNA molecule to which the gene of interest is integrated for cloning is called:

A Vector

B Template

C Carrier

D Transformer

Correct Answer

Option A

Solution

(a) A vector is a DNA molecule which is used as a vehicle to carry the gene of interest to another cell.

Q63

DNA precipitation out of a mixture of biomolecules can be achieved by treatment with:

A Isopropanol

B Chilled ethanol

C Methanol at room temperature

D Chilled chloroform

Correct Answer

Option B

Solution

(b) Chilled ethanol is used for the precipitation of DNA during isolation.

Q64

An enzyme catalysing the removal of nucleotides from ends of DNA is :

A Protease

B DNA ligase

C Endonuclease

D Exonuclease

Correct Answer

Option D

Solution

(d) Exonucleases remove nucleotides from the end of a DNA molecule.

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