DNA Replication

If a DNA strand has the sequence: AAT GCA, the complementary strand will be:

• TTA CGT

• AAT GCA

• UUA CGU

• UUU CGU

Replication means:

• To copy

• To destroy

• To build up

• To catalyze

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Why does your DNA have to replicate?

• During mitosis, your cells divide into 2 new cells

• It is healthier to have extra DNA strands in your cells

• Replication helps build new proteins in your cells.

• Replication keeps your organelles in your cell from being destroyed.

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In which phase of the cell cycle does DNA replicate?

• G1

• S

• G2

• Mitosis

Which best describes the function of helicase?

• It unwinds the DNA strand

• It builds & edits the new DNA strand

• It re-seals the DNA strand

• It replicates the nucleus

Which best describes the function of DNA polymerase?

• It unwinds the DNA strand

• It builds & edits the new DNA strand

• It re-seals the DNA strand

• It replicates the nucleus

Which best describes the function of ligase?

• It unwinds the DNA strand

• It builds & edits the new DNA strand

• It re-seals the DNA strand

• It replicates the nucleus

DNA is double-stranded. In replication, each new DNA molecule is made of:

• 2 entirely new DNA strands

• 2 old parent strands

• 1 old strand + 1 new strand

SELECT 2: Which describe covalent bonds?

• Strong bonds

• Weak bonds

• They hold the DNA backbone together

• They are "unzipped" during replication

SELECT 2: Which describe hydrogen bonds?

• Strong bonds

• Weak bonds

• They hold the DNA backbone together

• They are "unzipped" during replication