MarksRiser
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Zoology-Recombinant DNA

NEET Zoology Recombinant DNA MCQ Question

Type: MCQ-numerical-Hard-Class 12

If a recombinant DNA is formed by inserting a gene of interest into a plasmid vector using a specific restriction enzyme, and the plasmid has a total length of 6000 base pairs after insertion, how many base pairs were originally in the vector if the gene of interest is 1500 base pairs long?

A

4500 base pairs

B

7500 base pairs

C

6000 base pairs

D

1500 base pairs

Correct Answer

Option A

Detailed Explanation

The total length of the recombinant DNA is the sum of the original vector length and the gene of interest. Since the recombinant DNA is 6000 base pairs and the gene of interest is 1500 base pairs, the original vector length must be 6000 - 1500 = 4500 base pairs.

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