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Questions and Answers

Shown below is a replication bubble. At which location is the DNA polymerase adding nucleotides in a continuous manner?

A and B

C and D

A and D (correct)

B and C

What is the name of the DNA sequence where replication begins?

replication origin (correct)

initiator

replication fork

DNA template

What is the function of a topoisomerase in DNA replication?

It coils the DNA for tighter packaging.

It separates the DNA strands.

It relieves the tension in DNA strands. (correct)

It binds the template DNA to hold in place.

How does Polymerase help maintain the accuracy of DNA replication?

DNA polymerase can cut out improperly base-paired nucleotides and add the correct one during synthesis. Signup and view all the answers

The bonds that link two DNA strands together are

hydrogen bonds. Signup and view all the answers

The sequence at which DNA replication begins tends to have which characteristic?

AT-rich Signup and view all the answers

Which double-strand break repair mechanism is a simple ligation mechanism?

nonhomologous end joining Signup and view all the answers

How are the primers from which DNA synthesis starts different from the DNA itself?

The primers are made up of RNA not DNA. Signup and view all the answers

If a stretch of DNA on the parental strand of a replicating chromosome has the sequence 5′–AGCTCGATCGGCTA–3′, what will the sequence of the newly synthesized strand made from this stretch of template be?

3′–TCGAGCTAGCCGAT–5′ Signup and view all the answers

The energy for the polymerization reaction in DNA synthesis is powered by

the breaking of high-energy phosphate bonds in the deoxynucleotides. Signup and view all the answers