BIO NMDCAT BIOLOGICAL MOLECULES

nmdcat.online June 27, 2026

The role of histone proteins in eukaryotic chromosomes is to provide a

A. Scaffold for the formation of the phosphodiester backbone

B. Template for the synthesis of messenger RNA

C. Source of energy for DNA unwinding during replication

D. Structural core for the packaging of DNA into nucleosomes

✓

📝 Explanation

Histones are basic proteins that associate with and neutralize the negative charge of the DNA phosphate backbone. The DNA wraps around an octamer of histone proteins to form a nucleosome, the fundamental unit of chromatin packaging, allowing the long DNA molecule to be compacted.

📖 Additional Information

Scaffold for the formation of the phosphodiester backbone
Template for the synthesis of messenger RNA
Source of energy for DNA unwinding during replication
Structural core for the packaging of DNA into nucleosomes

Histones are basic proteins that associate with and neutralize the negative charge of the DNA phosphate backbone. The DNA wraps around an octamer of histone proteins to form a nucleosome, the fundamental unit of chromatin packaging, allowing the long DNA molecule to be compacted.

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