MCB 2289L Quiz Module 5 Paper

MCB 2289L Quiz Module 5 Paper

MCB 2289L Quiz Module 5 Paper

G282L/MCB2289L Section 2L Introduction to Microbiology Lab – Residential and Online – 2017 Summer Quarter

• Question 1

A hypotonic solution is one with a solute concentration greater than that of a cell.

• Question 2

Human skin provides an environment with NaCl levels slightly above that of most bacterial cells. Which organism would most likely be found on the skin?

• Question 3

All of these terms categorize microorganisms based on their temperature preference EXCEPT which?

• Question 4

All microorganisms use oxygen in their metabolism

• Question 5

An organism that has an optimal pH for growth below 5.5 is considered an acidophile

• Question 6

Atmospheric gases, nutrients, pH, energy sources and radiation are all examples of ______ factors that affect microbial growth

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• Question 7

The slowed growth or lack of growth of an organism at temperatures of pH outside of its ideal range is most likely due to changes in its ________?

• Question 8

The ideal environment for microbial growth would be:

Selected Answer: Warm, isotonic, neutral pH

• Question 9

Which of the following would be used to provide the optimum growth temperature for microorganisms that typically grow in humans?

• Question 10

An organism that is unable to grow in the presence of atmospheric levels of gaseous oxygen, but needs a small amount of oxygen for its metabolism is called a __________________?

• Question 11

Most human pathogens are classified as thermophiles.

• Question 12

A solution with a pH of 7 is acidic.

• Question 13, MCB 2289L Quiz Module 5 Paper

A hypertonic solution is prepared by the addition of sucrose. Which of the following would happen to bacteria placed in this solution:

• Question 14

All of the following organisms are expected to grow within an anaerobe jar EXCEPT

• Question 15

A microorganism will grow across the range of pH that allows for normal enzymatic function

• Question 16

Where would you expect an obligate anaerobe to grow in a nutrient broth tube?

• Question 17

The term aerobic, anaerobic, and microaerophilic are used to categorize microorganisms based on their ______ requirements.

• Question 18

All of the following are environmental factors that affect microbial growth EXCEPT

• Question 19

The changes or breakdown of three dimensional proteins that may result from a pH outside of an organism’s growth range is referred to as ______________

• Question 20

Distilled water would be _______ to bacterial cells: MCB 2289L Quiz Module 5 Paper