Genetics Review

Which of the following best describes a DNA molecule?

• double helix
• contains ribose
• made of amino acids
• contains Uracil

Tags

NGSS.HS-LS1-1

A nucleotide includes...?

• 5-carbon sugar

• nitrogenous base

• phosphate group

• all of the above

In DNA, Adenine bonds with ______________.

• Guanine
• Thymine
• Cytosine
• Adenine

Guanine bonds with ______________.

• Adenine
• Guanine
• Cytosine
• Thymine

Which 2 molecules forms the sides (backbone) of the DNA ladder?

• deoxyribose and adenine
• deoxyribose and a hydrogen bond
• sugar and the nucleus
• deoxyribose (sugar) and phosphate

What is responsible for holding the two strands of the DNA double helix together?

• hydrogen bonds
• alleles
• London dispersion forces
• deoxyribose sugars

Name this structure

• double helix
• nucelotide
• twisted ladder
• hydrogen bond

Tags

NGSS.HS-LS1-1

Which enzyme is responsible for adding nucleotides?

• Topoisomerase
• DNA Polymerase
• Ligase
• Primase

After analyzing a sample of DNA, a scientist recorded the data shown in the table. What percentage of the DNA sample is cytosine?

• 22%
• 25%
• 28%
• 56%

Enzyme that unwinds and separates the DNA

• ligase

• DNA Polymerase

• primase

• helicase