Home Biology Biotechnology and Its Application Statement Based Questions Read the following four statements ( i-iv) a…
Biology Biotechnology and Its Application Statement Based Questions Single Correct MCQ
Published on: August 21, 2026

Read the following four statements ( i-iv) and answer the question?

(i) The first transgenic buffalo, Rosie produced milk which was human alpha-lactal albumin enriched.

(ii) Restriction enzymes are used in isolation of DNA from other macro-molecules.

(iii) Downstream processing is one of the steps of R-DNA technology.

(iv) Disarmed pathogen vectors are also used in transfer of R-DNA into the host.

Which are the two statements having mistakes?

A
(ii) and (iii)
B
(iii) and (iv)
C
(i) and (iii)
D
(i) and (ii)

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Text Solution

Verified by Experts
The correct answer is:
D

(i) Incorrect → The first transgenic cow Rosie (not buffalo) produced milk enriched with human alphalactalbumin.

(ii) Incorrect → Restriction enzymes are used to cut DNA at specific sites, not for the isolation of DNA from other macromolecules.

(iii) Correct → Downstream processing is an important step in recombinant DNA (r-DNA) technology.

(iv) Correct → Disarmed pathogen vectors are used to transfer recombinant DNA into the host.

Therefore, the two incorrect statements are (i) and (ii).

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