56. The bacterial DNA polymerase has ____ domains A) 2, polymerase and 5\' to 3\

Question

56. The bacterial DNA polymerase has ____ domains

A) 2, polymerase and 5' to 3' exonuclease

B) 3, polymerase, 5' to 3' exonuclease, and 3' to 5' exonuclease

C) 3, polymerase, 5' to 3' exonuclease, and nick-translation domain

D) 1, polymerase

E) 4, polymerase, 5' to 3' exonuclease, 3' to 5' exonuclease, and nick-translation domain

57. When Glucocorticoid receptor is bound by its hormone, the ________ binds against the body of the receptor causing a change in receptor affinity from _____ to ______

A) helix 11, corepressors, coactivators

B) helix 11, coactivators, corepressors

C) helix 12, histone H2a, histone H2b

D) helix 12, corepressors, coactivators

E) helix 12, coactivators, corepressors

58. Lac operon is transcriptionally active when

A) glucose is absent and lactose is absent

B) glucose is present and lactose is absent C) glucose is absent and lactose is present

D) glucose is present and lactose is present

E) level of cAMP is high

Explanation / Answer

Ans-56- option a is correct I.e. 2, polymerase and 5'-3' exonuclease activity

Because 3'-5' exonuclease activity is absent in bacteria polymerase.

Ans-57- option b is correct I.e. helix 11, coactivator, corepressor

Ans-58- option c is correct I.e. when glucose is absent and lactose is present.

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