Question

In addition to highly repetitive and unique DNA sequences, a third category of DNA sequences exists. What is it called and what types of elements are involved?

a. composite DNA, lelomeres and heterochromatin
b. dominant DNA, euchromatin and heterochromatin
c. multiple gene family DNA, hemoglobin and 5 OS RNA
d. moderately repetitive DNA, SINEs, LINEs, and VNTRs
e. permissive DNA, centromeres and heterochromatin

Answer 1

The third category of DNA sequences is called moderately repetitive DNA, which includes elements such as SINEs, LINEs, and VNTRs.

Step-by-step explanation:

The third category of DNA sequences, apart from highly repetitive and unique DNA sequences, is called moderately repetitive DNA. This category includes elements like Short Interspersed Nuclear Elements (SINEs), Long Interspersed Nuclear Elements (LINEs), and Variable Number Tandem Repeats (VNTRs).

These are not as repetitive as satellite DNA (like telomeres) and make up a substantial part of the eukaryotic genome, with functions ranging from gene regulation to increasing genetic diversity in evolution.