Chapter 5 - DNA

Question 1

In DNA base pairing, adenine is a ____ that pairs to ____ with 2 hydrogen bonds

Answer 1

Purine; thymine (pyrimidine)

Question 2

In DNA base pairing, guanine is a ____ that pairs to ____ with 3 hydrogen bonds

Answer 2

Purine; cytosine (pyrimidine)

Question 3

What kind of structure do purines have?

Answer 3

Double ring

Question 4

What kind of structure do pyrimidines have?

Answer 4

Single ring

Question 5

What are genes?

Answer 5

A sequence of As, Cs, Gs, and Ts that contain information for a cell to read and use

Question 6

The length and sequence of a gene determine what?

Answer 6

The size and shape of the protein that it builds

Question 7

Hemoglobin

Answer 7

Protein structure in red blood cells that captures oxygen molecules when blood flows near the lungs and releases them later when later when blood flows near oxygen starved tissues

Question 8

Pepsin

Answer 8

Digestive protein that breaks down food inside your stomach

Question 9

Keratin

Answer 9

Structural protein that links with other keratin proteins to form hard structures like fingernails, claws, and beaks

Question 10

DNA is wrapped tightly around ___

Answer 10

Histones

Question 11

DNA and histones together are known as ____

Answer 11

Nucleosomes - the basic unit of DNA packaging