Question

Minisatellites

• A. Are surrounded by conserved restriction sites
• B. Are also known as variable number of tandem repeats (VNTR)
• C. Code for structural proteins only
• D. Both (1) and (2)

Answer 1

The correct option is D Both (1) and (2)

A minisatellite is a tract of repetitive DNA in which certain DNA motifs (ranging in length from 10–60 base pairs) are typically repeated 5-50 times. A variable number tandem repeat (or VNTR) is a location in a genome where a short nucleotide sequence is organized as a tandem repeat. These can be found on many chromosomes especially in minisatellites.

Minisatellite analysis, like RFLPs, also involves digestion of genomic DNA with restriction endonucleases, but minisatellites are a conceptually very different class of marker. They consist of chromosomal regions containing tandem repeat units of a 10-50 base motif, flanked by conserved DNA restriction sites.

So, the correct option is ' Both (1) and (2)'.