
Concept explainers
To determine:
Definition and diagram of the term double helix and nucleosome.

Explanation of Solution
Double Helix:
A double helix is a twisted ladder-like structure of DNA. The DNA is made up of two strands stick together with help of hydrogen bonding between the complementary base pairs. Given below is the double-stranded structure of DNA.
Nucleosome:
It is referred to as a section of DNA that is wrapped around histone protein in the nucleus. The nucleosome allows the coiling of the DNA and fits it in a smaller space inside the nucleus. Given below is a diagram of a nucleosome.
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