Question

Histones are
A) Glycoproteins
B) Mucoproteins
C) Basic proteins

Answer 1

Hint:Histones are a family of proteins which are found associated with the DNA in the nucleus and it helps in condensing it into a chromatin. They are found in eukaryotic cells inside the nucleus.

Complete answer:
Histones are associated with the DNA. Histones are composed of mostly positively charged amino acid residues such as lysine and arginine. Let us analyse each given option to find out the correct answer.
>Option A: Glycoproteins is a protein that contains oligosaccharide chains (glycans) covalently attached to amino acid side-chains. The carbohydrate is attached to the protein in a cotranslational or posttranslational modification. It is involved in many physiological functions including immunity. Therefore, this is an incorrect option.
>Option B: Mucoproteins is a mucoprotein is a glycoprotein composed primarily of mucopolysaccharides. It is found throughout the body, including the gastrointestinal tract, reproductive organs, airways, and the synovial fluid of the knees. Therefore, this is an incorrect option.
>Option C: Histones are small proteins that have a high amount of basic amino acids (arginine and lysine) and are called basic proteins. Each nucleosome consists of a segment of DNA wrapped in sequence around eight histone protein cores. It belongs to the family of basic proteins that associate with DNA in the nucleus and help condense it into chromatin. They are alkaline (basic pH) proteins, and their positive charges allow them to associate with DNA. Therefore, this is the correct option.
>Option D: Histones contain a high amount of basic acids such as arginine and lysine. They do not contain
acidic protein such as glutamic acid and aspartic acid. Therefore, this is an incorrect option.

Note:It is to be noted that the function of the histones is:-
>Its primary functions are compact DNA strands and impact chromatin regulation.
>It protects DNA from binding and cleavage by a variety of small molecules and proteins.