Question

Study the following and pick up the correct statements:
In DNA fingerprinting, DNA is cut into small pieces at specific sites by restriction endonucleases.
Transfer of DNA strands on to the nylon membrane is called southern blotting.
The largest known human gene codes for the protein dystrophin.
Least number of genes are located in Y-chromosome.

• A. I only
• B. I and II only
• C. I, II and III only
• D. I, II, III and IV

Hint:

Southern blotting and restriction endonucleases are core techniques in genetic analysis and DNA fingerprinting.

Answer 1

The Correct Option is D

All four statements are scientifically accurate: \begin{itemize} \item Restriction endonucleases cut DNA at specific sites — used in DNA fingerprinting. \item Southern blotting involves transfer of DNA fragments to a membrane. \item Dystrophin is the largest known human gene. \item Y-chromosome has the least number of genes compared to other chromosomes. \end{itemize}