DNA Structure and Function Practice

Which nitrogen base pairs with Adenine in DNA?

• Uracil

• Thymine

• Cytosine

• Guanine

Which of the following is not a component of RNA?

• Adenine

• Thymine

• Cytosine

• Guanine

What are chromosomes?

• Tightly coiled strands of DNA

• Sections of DNA that code for proteins

• Single strands of RNA

• Proteins that regulate cell functions

Tags

NGSS.HS-LS3-1

What is a gene?

• A section of DNA that has instructions to code for a protein

• A tightly coiled strand of DNA

• A type of protein

• A single strand of RNA

Tags

NGSS.HS-LS3-2

According to base-pairing rules, which bases pair together?

• A-G and C-T

• A-T and C-G

• A-C and G-T

• A-A and C-C

What is formed at the end of DNA replication?

• One identical DNA molecule

• Two identical DNA molecules

• Three identical DNA molecules

• Four identical DNA molecules

What is formed as a result of DNA replication?

• Identical strands

• Complementary strands

• Non-complementary strands

• Random strands

What is the role of the enzyme Primase in DNA replication?

• It adds DNA nucleotides to the template strand.

• It adds RNA nucleotides to help DNA Polymerase III attach to the DNA templates.

• It unwinds the DNA double helix.

• It joins Okazaki fragments on the lagging strand.

Why must complementary RNA nucleotides be added to the template DNA?

• To unwind the DNA double helix.

• To provide a starting point for DNA Polymerase III.

• To separate the DNA strands.

• To terminate DNA replication.

Which enzyme synthesizes RNA primers during DNA replication?

• DNA Ligase

• DNA Polymerase III

• Primase

• Helicase