Question

In the following figure, where are the histone tails?

-3 (looks like a bunch of proteins)
-1 (looks like a CTD)
- 2 (looks like DNA)

Answer 1

Histone tails are the N-terminal extensions of the histone proteins, which can be modified to alter DNA-histone binding and are not visible in the provided illustration.

Step-by-step explanation:

The histone tails are the N-terminal extensions of the histone proteins that are subject to post-translational modifications such as the addition of phosphate, methyl, or acetyl groups. These tails protrude from the nucleosome core and can interact with the intervening DNA. The diagram you mentioned suggests that you are looking at a representation of DNA and protein interactions, so the histone tails would be the parts of the histone proteins that extend outwards from the nucleosome bead structure, which is not visible in the illustration.