Part A

Question

What catalyzes DNA synthesis?
View Available Hint(s)for Part A

dNTPs
Replication fork
Primer
DNA polymerase
Part B
Which of the following statements about DNA synthesis is true?
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DNA polymerase adds dNTP monomers in the 3’ to 5’ direction.
Primers are short sequences that allow the initiation of DNA synthesis.
Nucleotides are added in a random fashion to single-stranded DNA.
As DNA polymerase moves along the template strand, each new nucleotide provides a 5’ hydroxyl group for the next reaction to occur.
Part C
Which part of a deoxynucleoside triphosphate (dNTP) molecule provides the energy for DNA synthesis?
View Available Hint(s)for Part C

Base
Sugar
Phosphate groups
Free 3' hydroxyl (–OH) group
Part D
Which of the following enzymes creates a primer for DNA polymerase?
View Available Hint(s)for Part D

Topoisomerase
Primase
Ligase
Helicase
Part E
Which of the following statements about Okazaki fragments in E. coli is true?
View Available Hint(s)for Part E

They are synthesized in the 3’ to 5’ direction.
They are usually 50 to 500 bases long.
They are sealed together by the action of helicase.
They are formed on the lagging strand of DNA.
Part F
Which of the following enzymes is important for relieving the tension in a helix as it unwinds during DNA synthesis?
View Available Hint(s)for Part F

Single-strand binding proteins
Ligase
Helicase
Topoisomerase
Part G
True or false? Single-stranded DNA molecules are said to be antiparallel when they are lined up next to each other but oriented in opposite directions.
View Available Hint(s)for Part G

True
False

Answer 1

Sure! Here are the answers for each part:

Part A

What catalyzes DNA synthesis?

• Answer: DNA polymerase

Part B

Which of the following statements about DNA synthesis is true?

• Answer: Primers are short sequences that allow the initiation of DNA synthesis.

Part C

Which part of a deoxynucleoside triphosphate (dNTP) molecule provides the energy for DNA synthesis?

• Answer: Phosphate groups

Part D

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

• Answer: Primase

Part E

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

• Answer: They are formed on the lagging strand of DNA.

Part F

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

• Answer: Topoisomerase

Part G

True or false? Single-stranded DNA molecules are said to be antiparallel when they are lined up next to each other but oriented in opposite directions.

• Answer: True

If you have any further questions or need additional information, feel free to ask!