Measure the packaging

Exercise and reference answers

Questions

1. Answer

   46

   Question

   Chromosomes in one human body cell

2. Answer

   2

   Question

   Length in metres of that cell's DNA end to end

3. Answer

   2

   Question

   Diameter in nm of a bare DNA double helix

4. Answer

   10

   Question

   Diameter in nm of a nucleosome bead

5. Answer

   30

   Question

   Width in nm of the coiled chromatin fibre

Instructions

Work out each number and key it in.

Explanation