Quiz 23 Redo: DNA Replication

What enzyme is responsible for replicating DNA?

• RNA polymerase

• helicase

• DNA polymerase

• Ribosomes

Answer explanation

RNA polymerase - makes RNA (not DNA)

Helicase - unzips DNA hydrogen bonds

Ribosomes - Read mRNA to make proteins

Check each enzyme that is needed for DNA replication

• DNA replicase

• DNA polymerase

• Ribosomes

• helicase

• transcription factors

Answer explanation

There are others.

Primase helps to synthesize the lagging strand of DNA (the strand that is made backwards).

Which enzyme creates the replication fork?

• Ribosomes

• Helicase

• DNA polymerase

• Transcription factors

Which strand of DNA is synthesized continuously?

• Leading Strand

• Lagging Strand

Answer explanation

Because DNA is antiparallel, one strand must be copied using fragments. What are these fragments called?

• Okazaki Fragments

• DNA replicase fragments

• primase

• primers

When DNA is replicated, the result is

• 1 old double helix and 1 new

• 2 double helixes. Each with 1 old and 1 new strand

• 1 double helix

• 2 new double helixes

Tags

NGSS.HS-LS3-2

Replicate this strand:

ACCGGATT

• TCCGGATT

• AGGCCTAA

• TGGCCTAA

• CCGGAATT

Answer explanation

A becomes T

C becomes G

What does helicase break?

• ionic bonds

• hydrogen bonds

• hearts

• legs

Answer explanation

What part of the cell cycle does replication occur?

• S phase

• Prophase

• Metaphase

• G1

What form of DNA is replicated

• chromatin

• chromosomes

Answer explanation

chromosomes are too dense. can't get polymerase on it