Course

Microbiology

Study Pack

Set 9 Gene Transfer Mutations And Genome Evolution

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Question 1

(Multiple Choice)

Free
Competence in Gram-positive organisms is induced by

A) calcium and cold.
B) electrical currents.
C) competence factors made of peptides.
D) presence of biofilm.
E) Competence is not induced in Gram-positive bacteria.

Answer

Question 2

(Multiple Choice)

Free
During conjugation, the DNA passes through the ________, NOT the ________.

A) membranes; pilus
B) pilus; membranes
C) pilus; phage
D) phage; pilus
E) F factor; phage

Answer

Question 3

(Multiple Choice)

Free
A difference between type II restriction enzyme and type I or type III restriction enzymes is that

A) type II enzymes require shorter recognition sequences.
B) type II enzymes cut at the recognition sequence rather than elsewhere.
C) type I and III cut palindromic sequences but type II does not.
D) type I and III require different proteins for methylation and cutting.
E) type II enzymes are found only in Gram-positive bacteria.

Answer