Chapter 6

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What catalyzes DNA synthesis?

DNA polymerase

Which of the following statements about DNA synthesis is true?

Primers are short sequences that allow the initiation of DNA synthesis

Which part of dNTP provides energy for DNA synthesis

Phosphate groups

Which of the following enzymes creates a primer for DNA polymerase?

Primase

Which of the following statements about Okazaki fragments i E. coli is true?

The form on the lagging strand of DNA

Which of the following enzymes is important for relieving the tension in a helix as it unwinds during DNA synthesis

Topoisomerase

True or False: Single DNA molecules are said to be antiparallel when they are lined up next to each other but oriented in opposite directions

True

Leading strand

1. only one primer needed 2. made continuously 3. daughter strand elongates toward replication fork

Lagging strand

1. made in segments 2. multiple primers needed 3. daughter strand elongates away from replication fork

Both strands

Go from 5′ to 3′

Short segments of newly synthesize DNA are joined into a continuous stand by (blank)

ligase

After DNA replication is completed, (blank)

each new DNA helix has one new and one old DNA strand

Helicase creates (blank)

replication forks and replication bubbles

The new DNA strand that grows continuously in the 5′ to 3′ direction is the (blank)

leading strand

(Blank) are short sections of DNA that are synthesize on the lagging strand of the replicating DNA

Okazaki fragments

During DNA replication, an open section of DNA, in which a DNA polymerase can replicate DNA, is called (blank)

replication fork

After replication is complete, the new DNAs, called (blank), are identical to each other

daughter DNA

The enzyme that can replicate DNA is called (blank)

DNA polymerase

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