Biology · CELL THE UNIT OF LIFE

Consider the following statements about chromatin and chromosomes in human cells: (A) A single human cell contains approximately two metres of DNA distributed among its 46 chromosomes. (B) Chromatin contains DNA, basic proteins called histones, non-histone proteins, and RNA. (C) Secondary constrictions are non-staining regions found on all 46 chromosomes at constant locations. (D) Chromosomes with a terminal centromere are designated as telocentric chromosomes. Which of the above statements are correct?

1. (A) and (C) only
2. (B) and (C) only
3. (A), (B), (C) and (D)
4. (A), (B) and (D) only