This enzyme cleaves both strands of DNA, swivels the ends of the broken strands to relieve the torsional stress, and then rejoins the strands.

A. gyrase
B. ligase
C. ribonuclease
D. catalase
E. helicase


Ans: A. gyrase

Biology & Microbiology

You might also like to view...

In a mutualistic relationship with a fungus, the plant can receive

a. minerals. b. protection. c. water. d. all of these

Biology & Microbiology

Sexual reproduction involves ____

a. one diploid cell fertilizing a haploid cell b. the union of two somatic cells c. the union of male and female gametes d. a single mitotic division of the parent cell to produce a daughter cell e. the union of two gametes to produce a haploid zygote

Biology & Microbiology

Which of the following is a common protist-caused sexually transmitted disease?

a. trichomonisasis b. yeast infection c. chlamydia

Biology & Microbiology

The fungal group that is most closely related to ancestral fungi are the

A. Blastocladiomycota. B. Neocallimastigomycota. C. Zygomycota. D. Microsporidia. E. Chytridomycota.

Biology & Microbiology