DNA Replication Review

What is DNA replication?

• The process where DNA makes a copy of itself

• The process where DNA is transcribed into protein

• The process where RNA makes a copy of itself

• The process where DNA is destroyed

Why is DNA replication important?

• To ensure each daughter cell receives a complete set of chromosomes

• To repair damaged DNA

• To create genetic diversity

• To produce energy for the cell

Where does DNA replication take place in eukaryotic cells?

• Endoplasmic reticulum

• Mitochondria

• Nucleus

• Cytoplasm

When does DNA replication occur in the cell cycle?

• M phase

• S phase

• G1 phase

• G2 phase

What is the first step of DNA replication?

• DNA helicase unwinds DNA

• Replication fork is formed

• DNA polymerase adds nucleotides in the 5’ to 3’ direction

• Okazaki fragments are bound together by ligase

Which enzyme adds free nucleotides and uses the original DNA strand as a template during DNA replication?

• DNA polymerase

• Ligase

• Primase

• Helicase

What is the purpose of the primer in DNA replication?

• To seal pieces on the lagging strand together

• To add free nucleotides

• To proofread and correct mistakes

• To identify where replication should begin

What does semi-conservative mean in the context of DNA replication?

• Each new DNA strand is entirely new

• Each new DNA strand is a mirror image of the original strand

• Each new DNA strand contains one old strand and one new strand

• Each new DNA strand is a copy of the original strand

What is the rule that DNA polymerase uses during DNA replication?

• A-T and C-G

• A-C and T-G

• G-C and T-A

• G-T and C-A

If a DNA sample has 40% T, how much A will be present?

• 40%

• 20%

• 30%

• 10%