Question

Minisatellite sequences are repeat units with base pairs
A. $2-6$
B. $6-30$
C. $11-60$
D. $21-100$

Answer 1

Hint: Minisatellite DNA is also known as Variable number of tandem repeats (VNTRs). These are found at more than $1000$ locations in a human genome. They are very prominent at the centromere and telomere. The minisatellite DNA is known for its high diversity and mutation. The smaller versions of minisatellite are called microsatellites and they are termed as short tandem repeats. No coding of proteins takes place for the minisatellite region of DNA.

Complete answer:
Option A: $2-6$
A DNA with $2-6$ base pairs is known as microsatellite DNA. Microsatellites can be found in the coding as well as non coding regions of a DNA. Microsatellite DNA is used as a genetic marker to trace the inheritance of certain genes in families.
Option A is not correct
Option B: $6-30$
DNA with $6-30$ base pairs is not known as minisatellite. For DNA to be minisatellite, the number of base pairs must be greater than$10$.
Option B is not correct.
Option C: $11-60$
A DNA with $11-60$ base pairs is known as a minisatellite DNA. They are present in high concentration at the telomere of DNA, and therefore it protects the chromosome from getting damaged. The minisatellite region of DNA is not responsible for coding of protein. Minisatellites are generally rich in GC content. $90%$ of minisatellites in human DNA are found at the subtelomeric region of a chromosome.
Option C is correct.
Option D: $21-100$
A DNA that contains $21-100$ base pairs is not known as a minisatellite DNA. Minisatellite DNA has less than $60$ base pairs.
Option D is not correct.

Hence, Option C is the correct answer.

Note:
DNA is the genetic material of organisms. DNA is mainly composed of four nitrogen bases; Adenine, Guanine, Thymine, cytosine. Adenine and Guanine are purine nitrogen bases whereas cytosine and thymine are pyrimidine nitrogenous bases. These bases placed in a sequence form the structure of DNA.