DNA Structure

What letter doecs not represent a nucleotide found in DNA?

• A
• U
• T
• G

What are the three parts of a nucleotide?

• Nitrogen, carboxylic acid, R group
• Nitrogenous base, sugar, sulfur group
• Nitrogenous base, sugar, phosphate group
• Nitrogenous base, phenol, phosphate group

What are genes composed of?

• nuclei

• chromosomes

• DNA

• cells

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine
• guanine
• thymine
• uracil

Guanine bonds with ______________.

• Adenine
• Guanine
• Cytosine
• Thymine

What determines the code, or information, of a DNA molecule?

• the shape (structure) of the nitrogen bases
• the order (sequence) of the nitrogen bases
• the color of the nitrogen bases
• the frequency (number) of nitrogen bases

Tags

NGSS.HS-LS1-1

Name this structure

• double helix
• nucelotide
• twisted ladder
• hydrogen bond

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

Nucleotides are made up of a sugar, phosphate, and..?

• nitrogenous base
• nucleic acid
• cholesterol
• fatty acid

In a certain gene, 15% of the DNA is thymine, how much of it is guanine?

• 15

• 35

• 30

• 70

Which sugar is contained in DNA

• Dextrose
• Ribose
• Deoxyribose
• Glucose