Question

In its extended 'beads-on-string' form of chromatin, the 'beads' in the string represent:

• A. Linker DNA
• B. Histone proteins
• C. Nucleosomes
• D. NHC proteins

Hint:

Nucleosomes are DNA-histone complexes that form the fundamental repeating unit of chromatin. Each bead is a nucleosome, and the string is linker DNA.

Answer 1

The Correct Option is C

In the beads-on-string model of chromatin structure, the "beads" represent nucleosomes. Each nucleosome consists of DNA wrapped around a core of histone proteins. The "string" part is the linker DNA, which connects one nucleosome to the next. This structure helps in the packaging of DNA into a compact form within the nucleus.