Question 1

What are telomeres?

Accepted Answer

Compound structures at the end of chromosomes that protect the ends of chromosome DNA from being damaged

(similar to the aglets at the end of shoelaces)

Question 2

What happens to telomeres when DNA is copied?

Accepted Answer

They slightly shorten, gradually shortening the chromosome

(DNA at the end of the chromosome cannot be fully copied, which is why telomeres shorten)

Question 3

What is telomerase?

Accepted Answer

An enzyme in certain cells that can extend the length of telomeres in chromosomes

(mostly active in germ cells, but not the rest of the body)

Telomeres, AP Biology Flashcards