Module 4 MCQ

Question 1

What structure(s) would contain a complete chromosome of a bacterium?

Answer 1

Nucleoid and Endospore

Question 2

What is the most important structure in bacteria for classifying them as either gram-negative or gram-positive?

Answer 2

Cell Wall

Question 3

The largest number of viable cells in a bacterial culture is found during the growth phase known as:

Answer 3

Stationary Phase

Question 4

A bacterium undergoes binary fission three times and none die. How many bacteria are there altogether?

Answer 4

8

Question 5

Characteristic of photoheterotrophic metabolism is:

Answer 5

a dependence on organic carbon for building blocks.

Question 6

What is NOT a photoautotrophs?

Answer 6

Fungi

Question 7

Which part of our gastrointestinal tract contains the highest concentration of microorganisms?

Answer 7

Colon

Question 8

The human microbiome is:

Answer 8

phylum poor but species rich.

Question 9

what is not a component of bacteriophage?

Answer 9

Lipid envelope

Question 10

What are viruses?

Answer 10

Acellular microorganisms.

Question 11

what is NOT a microbial virulence factor?

Answer 11

Plasmid

Question 12

Exotoxins are

Answer 12

toxic proteins secreted by a pathogen that can produce specific symptoms.

Question 13

Koch’s Postulates are BEST described by

Answer 13

A set of guidelines used to demonstrate that a specific pathogen causes specific disease symptoms.

Question 14

What is one of the LEAST selective bacterial target site for the development of antimicrobials?

Answer 14

Cell membrane.

Question 15

Beta-lactamase is an enzyme produced by some bacteria which:

Answer 15

inactivates penicillin molecules.

Question 16

Transduction is:

Answer 16

gene transfer between bacteria mediated by a virus.

Question 17

The horizontal transfer of drug resistant genes from one bacterium to another can be
aided by what structure?

Answer 17

Pilus

Question 18

Infections that spread globally are called:

Answer 18

Pandemic

Question 19

What are required for natural selection to occur?

Answer 19

selection, inheritance, variation, time

Question 20

What is a key components of the HIV lifecycle leads to a high rate of
mutation in its genome?

Answer 20

Reverse transcription.