DNA Structure

What are the three parts of a nucleotide?

• phosphate

• nitrogen base

• carbon

• deoxyribose sugar

The "middle" of the DNA ladder is made up of

• nitrogen bases

• sugar and phosphate

Tags

NGSS.HS-LS1-1

In DNA, the nitrogen base adenine pairs with

• Guanine

• Cytosine

• Uracil

• Thymine

How many hydrogen bonds form between Adenine and Thymine?

• 1

• 2

• 3

• 4

In DNA, the nitrogen base guanine pairs with

• Guanine

• Cytosine

• Adenine

• Thymine

The backbone of the DNA (sides of the ladder) is made up of

• nitrogen bases

• sugar and phosphate

How many hydrogen bonds form between Guanine and Cytosine?

• 1

• 2

• 3

• 4

The circled structure best represents a(n)

• nitrogen base pair

• DNA ladder rung

• Nucleotide

• Cytosine (C) molecule

• Adenine (A) molecule