Home Biology Biotechnology and Its Application Previous Year Questions Read the following four statements (A to D) …
Biology Biotechnology and Its Application Previous Year Questions Single Correct MCQ
Published on: August 13, 2026

Read the following four statements (A to D) about certain mistakes in two of them.

A
The first transgenic buffalo, Rosie produced milk which was human alpha-lactalbumin enriched. and and
B
Restriction enzymes are used in isolation of DNA from other macromolecules. and
C
Downstream processing is one of the steps of rDNA technology. and
D
Disarmed pathogen vectors are also used in transfer of rDNA into the host. Which of the two statements have mistakes?

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The correct answer is:
D

– Rosie was the first transgenic cow, not buffalo.

– Restriction enzymes cut DNA; they are not used for DNA isolation.

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