Question

Select the option which correctly identifies the labels in the structure shown in the diagram below:

• A. A - Chromatin fibre, B - Chromosome, C - DNA
• B. A- Chromosome, B- Chromatin fibre, C- DNA
• C. A- DNA, B- Chromosome, C- Genes
• D. A- Chromosome, B - DNA, C- Genes

Answer 1

The correct option is B A- Chromosome, B- Chromatin fibre, C- DNA

A chromosome is a structure found in the nucleus of eukaryotic organisms, which consists of highly coiled or condensed DNA along with histone proteins.

Label A shows the chromosome in its condensed form having a pair of sister chromatids joined at the centromere.

The label B shows the unwinding of the chromosome to reveal its chromatin fibre which is highly-coiled.

The last part of the diagram, label C, shows the DNA which is coiled around histone proteins to create the chromatin fibre.