Question

Chromatin contains (a) DNA (b) Basic protein histone (c) Some non-histone protein and RNA (d) All of these

Short answer

The chromatin contains all of these elements: DNA, basic protein histone, some non-histone protein and RNA. Therefore, answer option (d) is correct.

Step-by-step solution

Understanding Chromatin

Firstly, let's understand what chromatin is. Chromatin is a complex of DNA and protein found in eukaryotic cells. Its primary function is packaging long DNA molecules into a more compact, denser shape, which prevents the strands from becoming tangled and plays important roles in reinforcing the DNA during cell division, preventing DNA damage, and regulating gene expression and DNA replication.

Information About DNA

DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person’s body has the same DNA.

Definition of Basic Protein Histone

Histone proteins are the basic proteins that package and order the DNA into nucleosomes. They constitute the major proteins of chromatin.

Understanding Non-Histone Protein and RNA

Non-histone proteins are chromosomal proteins that are not histones. They have specific functions in packaging the DNA, controlling replication, setting up the chromosome structure, and controlling gene expression. Whereas RNA, or ribonucleic acid plays a key role in the formation of proteins in the body.

Answering The Question

Since Chromatin is composed of DNA and proteins (including histone and non-histone proteins) and also includes RNA, the correct answer is (d) All of these.