Question

How many nucleosomes are present in a mammalian cell?

• A. 20 million
• B. 30 million
• C. 40 million
• D. 10 million

Answer 1

Answer:

B. 30 million

The diploid cell of a eukaryotic mammal contains 6.4 x 109 nucleotides. A single cell of such type will 30 million nucleosomes in it. Nucleosomes containing chromatin when viewed under an electron microscope appear to be like “Beads-on-string”.