QuestionSBA
QuestionChoice
This is incorrect. DNA gyrase reduces supercoiling during DNA unwinding. DNA ligase is the enzyme involved in annealing ends of DNA fragments via the formation of phosphodiester bonds between the 3'-OH of one end with the 5'-phosphate of the other end.
10004358
c
Gyrase
QuestionChoice
This is incorrect. Topoisomerase (such as DNA gyrase) are involved in relaxing supercoiled DNA. DNA ligase is the enzyme involved in annealing ends of DNA fragments via the formation of phosphodiester bonds between the 3'-OH of one end with the 5'-phosphate of the other end.
10004360
e
Topoisomerase
QuestionChoice
This is correct. DNA ligase is the enzyme involved in annealing ends of DNA fragments via the formation of phosphodiester bonds between the 3'-OH of one end with the 5'-phosphate of the other end.
10004356
a
Ligase
QuestionChoice
This is incorrect. Telomerase is responsible for the synthesis of telomeric DNA repeats at the 3' ends to protect against DNA loss in rounds of DNA replication. DNA ligase is the enzyme involved in annealing ends of DNA fragments via the formation of phosphodiester bonds between the 3'-OH of one end with the 5'-phosphate of the other end.
10004359
d
Telomerase
QuestionChoice
This is incorrect. DNA helicase is involved in unwinding DNA. DNA ligase is the enzyme involved in annealing ends of DNA fragments via the formation of phosphodiester bonds between the 3'-OH of one end with the 5'-phosphate of the other end.
10004357
b
Helicase
Concept
Chapter
2693
4273
DNA
Topic
212
Molecular and Cellular Basis of Health and Disease
13418
When two separate pieces of DNA are cut by the same restriction enzyme it produces complementary sticky ends that can anneal to form one new piece of DNA. This can be done artificially in a lab to form recombinant DNA.

What enzymes form phosphodiesterase bonds to assist the annealing process?
a