DNA Structure Notes Review

What alternates with phosphates to make the backbone of DNA?

• Sugars

• Proteins

• Lipids

• Amino acids

What is the name of the sugar in the DNA backbone?

• Glucose

• Fructose

• Deoxyribose

• Ribose

Which nitrogen base pairs with adenine (A) in DNA?

• Cytosine (C)

• Guanine (G)

• Thymine (T)

• Uracil (U)

Tags

NGSS.HS-LS1-1

What type of nitrogen base is guanine (G)?

• Pyrimidine

• Purine

• Carbohydrate

• Lipid

How many rings do pyrimidines have?

• One

• Two

• Three

• Four

Which of the following bases is a pyrimidine?

• Adenine (A)

• Guanine (G)

• Cytosine (C)

• Uracil (U)

What do hydrogen bonds do in the structure of DNA?

• They hold the opposite sides of the ladder together.

• They break the DNA strands apart.

• They form the backbone of the DNA.

• They connect the sugar and phosphate groups.

How many hydrogen bonds connect adenine (A) to thymine (T) in DNA?

• 1

• 2

• 3

• 4

How many hydrogen bonds connect guanine (G) to cytosine (C) in DNA?

• 1

• 2

• 3

• 4

Which of the following is one of the three subunits that make up DNA?

• Amino acids

• Nucleotides

• Proteins

• Lipids