Rasmussen G282L Module 5 Quiz

16 Jun Rasmussen G282L Module 5 Quiz

Question
QUESTION 1

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

The bacterial cells will swell, but not lyse

There will be no change in the bacterial cells

The bacterial cells will undergo osmotic lysis

The bacterial cells will undergo plasmolysis

QUESTION 2

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 __________________?

Microaerophile

Obligate aerobe

Facultative anaerobe

Aerotolerant anaerobe

QUESTION 3

The ideal environment for microbial growth would be:

Warm, hypertonic, neutral pH

Cool, hypertonic, acidic pH

Warm, hypotonic, neutral pH

Warm, isotonic, neutral pH

QUESTION 4

Most human pathogens are classified as thermophiles.

True

False

QUESTION 5

Distilled water would be _______ to bacterial cells:

Isotonic

Hypotonic

Hypertonic

QUESTION 6

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

Refrigerator

Freezer

37 degree C incubator

72 degree C incubator

QUESTION 7

All microorganisms use oxygen in their metabolism

True

False

QUESTION 8

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

True

False

QUESTION 9

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

chemical

inhibitory

biotic

environmental

QUESTION 10

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

temperature

osmotic pressure

pH

cell wall type

QUESTION 11

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

Obligate anaerobe

Aerotolerant anaerobe

Obligate aerobe

Facultative anaerobe

QUESTION 12

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 ________?

Enzymes

Cell wall

Capsule

Bacterial chromosome

QUESTION 13

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?

A halotolerant organism

An organism that does not tolerate hypertonic salt conditions very well

An obligate anaerobe

A psychrophile

QUESTION 14

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

Thermophile

Microaerophile

Mesophile

Psychrophile

QUESTION 15

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 ______________

Elongation

Denaturation

Annealing

Degradation

QUESTION 16

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

Upper part of the tube

Lower part of the tube

Throughout the tube

Middle part of the tube

QUESTION 17

A solution with a pH of 7 is acidic.

True

False

QUESTION 18

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

True

False

QUESTION 19

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

oxygen

temperature

carbon dioxide

pH

QUESTION 20

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

True

False