Question 1

A microaerophile

Accepted Answer

A)   grows best in an anaerobic jar.
B)   grows with or without oxygen.
C)   needs normal atmospheric levels of oxygen.
D)   requires a small amount of oxygen but won't grow at normal atmospheric levels.E) None of the above
F) B) and D)

Question 2

Aerobic respiration is an example of

Accepted Answer

A)   photosynthesis.
B)   methanoheterotrophy.
C)   photoheterotrophy.
D)   chemoheterotrophy.
E)   photoautotrophy.F) C) and D)
G) A) and D)

Question 3

Contractile vacuoles are

Accepted Answer

A)   used to expel excess water from cells.
B)   found in bacterial cells.
C)   important to certain organisms in hypertonic environments.
D)   protein carriers in cell membranes.
E)   used to bring solutes into a cell.F) C) and D)
G) A) and D)

Question 4

Which location would best support the growth of a halophile?

Accepted Answer

A)   acid pools
B)   freshwater ponds
C)   hot geyser springs
D)   arid desert soil
E)   salt lakesF) B) and E)
G) B) and D)

Question 5

Facilitated diffusion is limited by

Accepted Answer

A)   ATP concentration.
B)   the number of carrier proteins in the membrane.
C)   size of the pores in the membrane.
D)   osmotic pressure.
E)   the size of the cell.F) A) and C)
G) A) and B) B

Question 6

A Coulter counter can count viable cells as well as determine the size.

Accepted Answer

A) True 
 B)False

Question 7

The majority of microbes live and grow in habitats between pH 7 and 9.

Accepted Answer

A) True 
 B)False

Question 8

Microorganisms require small quantities of this nutrient for enzyme function and maintenance of protein structure.

Accepted Answer

A)   element
B)   macronutrient
C)   water
D)   growth factors
E)   trace elementF) All of the above
G) C) and D)

Question 9

Obligate saprobes can adapt to a living host.

Accepted Answer

A) True 
 B)False

Question 10

The term obligate refers to

Accepted Answer

A)   the ability to exist in a wide range of conditions.
B)   existing in a very narrow niche.
C)   using chemicals for energy production.
D)   using light for energy production.
E)   using oxygen for metabolism.F) A) and D)
G) B) and D)

Question 11

Whether an organism is a phototroph or a chemotroph depends on its source of energy.

Accepted Answer

A) True 
 B)False

Question 12

The term phototroph refers to an organism that

Accepted Answer

A)   uses CO2 for its carbon source.
B)   must obtain organic compounds for its carbon needs.
C)   gets energy from sunlight.
D)   gets energy by oxidizing chemical compounds.
E)   does not need a carbon source.F) A) and B)
G) A) and C)

Question 13

The term facultative refers to

Accepted Answer

A)   the ability to exist in a wide range of conditions.
B)   existing in a very narrow niche.
C)   using chemicals for energy production.
D)   using light for energy production.
E)   using oxygen for metabolism.F) B) and D)
G) A) and B) A

Question 14

Growth factors

Accepted Answer

A)   are inorganic.
B)   are synthesized by the organism.
C)   contain elemental oxygen.
D)   cannot be synthesized by the organism.
E)   All of these choices are correct.F) A) and D)
G) B) and E)

Question 15

Cultures of a bacterial species were incubated out on the incubator shelf, in an anaerobic jar and in a candle jar. After incubation there was moderate growth of cultures in the candle and anaerobic jars, but heavy growth of the culture on the incubator shelf. This species is a/an

Accepted Answer

A)   aerobe.
B)   anaerobe.
C)   facultative anaerobe.
D)   microaerophile.
E)   capnophile.F) A) and B)
G) C) and D)

Question 16

The phase of the bacterial growth curve that shows the maximum rate of cell division is the

Accepted Answer

A)   lag phase.
B)   log phase.
C)   stationary phase.
D)   death phase.
E)   prophase.F) B) and C)
G) B) and E)

Question 17

When it is important to count the number of cells, determine cell size and differentiate between dead and live cells a ___ is used.

Accepted Answer

A)   Coulter counter
B)   flow cytometer
C)   SEM
D)   methylene dye indicator
E)   plate countF) A) and B)
G) B) and D) B

Question 18

Which location would best support the growth of a barophile?

Accepted Answer

A)   acid pools
B)   deep oceans
C)   hot geyser springs
D)   arid desert soil
E)   salt lakesF) None of the above
G) A) and D)

Question 19

Which of the following microorganisms would find hypotonic conditions most detrimental?

Accepted Answer

A)   bacteria
B)   protozoa
C)   fungi
D)   algae
E)   cyanobacteriaF) None of the above
G) C) and E)

Question 20

Bacterial endosymbionts have lost much of their genome and are dependent upon their aphid hosts for survival. Similarly, the aphids depend on the endosymbiotic bacteria for the supply of amino acids that they provide. This interdependence is the result of

Accepted Answer

A)   coevolution.
B)   syntrophy.
C)   amensalism.
D)   microbial antagonism.E) B) and D)
F) All of the above

Exam 7: Microbial Nutrition, Ecology, and Growth

A microaerophile

Correct AnswerverifiedShow Answer

Aerobic respiration is an example of

Correct AnswerverifiedShow Answer

Contractile vacuoles are

Correct AnswerverifiedShow Answer

Which location would best support the growth of a halophile?

Correct AnswerverifiedShow Answer

Facilitated diffusion is limited by

Correct AnswerverifiedB

A Coulter counter can count viable cells as well as determine the size.

Correct AnswerverifiedShow Answer

The majority of microbes live and grow in habitats between pH 7 and 9.

Correct AnswerverifiedShow Answer

Microorganisms require small quantities of this nutrient for enzyme function and maintenance of protein structure.

Correct AnswerverifiedShow Answer

Obligate saprobes can adapt to a living host.

Correct AnswerverifiedShow Answer

The term obligate refers to

Correct AnswerverifiedShow Answer

Whether an organism is a phototroph or a chemotroph depends on its source of energy.

Correct AnswerverifiedShow Answer

The term phototroph refers to an organism that

Correct AnswerverifiedShow Answer

The term facultative refers to

Correct AnswerverifiedA

Growth factors

Correct AnswerverifiedShow Answer

Cultures of a bacterial species were incubated out on the incubator shelf, in an anaerobic jar and in a candle jar. After incubation there was moderate growth of cultures in the candle and anaerobic jars, but heavy growth of the culture on the incubator shelf. This species is a/an

Correct AnswerverifiedShow Answer

The phase of the bacterial growth curve that shows the maximum rate of cell division is the

Correct AnswerverifiedShow Answer

When it is important to count the number of cells, determine cell size and differentiate between dead and live cells a ___ is used.

Correct AnswerverifiedB

Which location would best support the growth of a barophile?

Correct AnswerverifiedShow Answer

Which of the following microorganisms would find hypotonic conditions most detrimental?

Correct AnswerverifiedShow Answer

Bacterial endosymbionts have lost much of their genome and are dependent upon their aphid hosts for survival. Similarly, the aphids depend on the endosymbiotic bacteria for the supply of amino acids that they provide. This interdependence is the result of

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified