Genetics Unit Quiz

What are nucleic acids primarily responsible for?

• Transporting oxygen

• Building cell walls

• Providing energy

• Carrying genetic material

Which sugar is found in DNA?

• Ribose

• Glucose

• Deoxyribose

• Fructose

What is the shape of DNA?

• Single strand

• Double helix

• Circular

• Triple helix

Which base is found only in RNA?

• Cytosine

• Uracil

• Adenine

• Thymine

How many pairs of chromosomes do humans have?

• 74

• 23

• 46

• 37

What is the role of histones in DNA?

• They break down DNA

• They coil DNA into chromosomes

• They replicate DNA

• They transport DNA

What is the purpose of DNA replication?

• To create new proteins

• To repair damaged DNA

• To divide cells

• To make an identical copy of DNA

During DNA replication, what type of bonds hold the base pairs together?

• Covalent bonds

• Ionic bonds

• Metallic bonds

• Hydrogen bonds

What does semiconservative replication mean?

• DNA is replicated in a conservative manner

• Each new DNA molecule has one old and one new strand

• DNA is replicated in a random manner

• Each new DNA molecule has two new strands

Which phase of the cell cycle does DNA replication occur?

• G1 phase

• S phase

• G2 phase

• M phase