Course

Microbiology

Study Pack

Set 18 Introduction To Infectious Diseases

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Question 1

(Multiple Choice)

Free
Which of these is true of an attenuated strain of a pathogenic microbe infecting a susceptible healthy host?

A)The microbe will NOT replicate in the host.
B)The microbe will replicate in the host but not cause disease.
C)The microbe will replicate in the host and cause disease.
D)The microbe will replicate in the host and ultimately kill the host.
E)The microbe will NOT replicate in the host but will cause disease.

Answer

Question 2

(Multiple Choice)

Free
Ophiostoma novo-ulmi causes disease through:

A)production of chitinase which attacks beetle exoskeletons
B)production of chitinase damaging fungal structures
C)production of endotoxin released from its Gram negative cell wall
D)production of exotoxin released from its Gram positive cell wall
E)production of xylanase,destroying plant conductive tissue

Answer

Question 3

(Multiple Choice)

Free
In the CRISPR-Cas system,which component is responsible for phage destruction?

A)Pre-cRNA transcript
B)cRNA subunits
C)Cas helicase
D)Cas nuclease
E)CRISPR locus

Answer