Rasmussen G282L Module 5 Quiz Question # 00600960 Subject: Education Due on: 05/06/2019 Posted On: 05/06/2019 04:55 AM Tutorials: 1 Rating: 4.7/5

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