Question

Read the following four statements (A-D) about certain mistakes in two of them:
(A) The first transgenic buffalo, Rosie produced milk which was human alpha-lactalbumin enriched.
(B) Restriction enzymes are used in isolation of DNA from other macro-molecules.
(C) Downstream processing is one of the steps of r-DNA technology.
(D) Disarmed pathogen vectors are also used in transfer of r-DNA into the host.

Which are the two statements having mistakes?

• A. Statements (A) and (B)
• B. Statements (B) and (C)
• C. Statements (C) and (D)
• D. Statements (A) and (C)

Answer 1

The correct option is A Statements (A) and (B)

(A) Rosie was the first transgenic cow and its milk was rich in human alpha-lactalbumin protein.

(B) Restriction enzymes are used in the isolation of the specific segment of DNA from the DNA of the organism because these enzymes are capable of cutting the DNA at the specific location.

(C) Downstream processing is one of the steps in the r-DNA technology. It involves the extraction and purification of the desired product.

(D) Disarmed pathogens like Agrobacterium tumifaciens, phage viruses are also used in the transfer of r-DNA into the host.

Hence, the correct answer is '(A) and (B)'