Micro Ch 5 Test Banks
Study online at https://quizlet.com/_16ltqc
1. 1. __________ have evolved to survive multiple extreme b. Extremophiles
environments.
a. Psychrophiles d. Thermophiles
b. Extremophiles e. Acidophiles
c. Halophiles
2. 2. The membrane needs to remain __________ so that c. fluid
it can expand as cells grow larger and so proteins
needed for solute transport can be inserted into the
membrane.
a. rigid d. hypertonic
b. warm e. polarized
c. fluid
3. 3. The general result of the Arrhenius equation is that b. 10
growth rate roughly doubles for every __________°C rise
in temperature.
a. 5 d. 20
b. 10 e. 25
c. 15
4. 4. The fastest growth rate for a species occurs at tem- d. proteins
peratures where a cell's __________ work most efficient-
ly.
a. lipids d. proteins
b. membranes e. polysaccharides
c. nucleic acids
5. 5. Human pathogens are: c. mesophiles
a. halophiles d. thermophiles
b. psychrophiles e. extreme thermophiles
c. mesophiles
, Micro Ch 5 Test Banks
Study online at https://quizlet.com/_16ltqc
6. 6. __________ are prominent flora beneath icebergs in b. Psychrophiles
the Arctic and Antarctic.
a. Barophiles d. Thermophiles
b. Psychrophiles e. Acidophiles
c. Mesophiles
7. 7. __________ enzymes are stable in part because they c. Thermophilic
contain relatively low amounts of the amino acid
glycine.
a. Psychrophilic d. Halophilic
b. Acidophilic e. Barophilic
c. Thermophilic
8. 8. __________ grow at temperatures as high as 121°C, e.Hyperthermophiles
which occur under extreme pressure.
a. Thermophiles d. Hyperpsychrophiles
b. Extreme halophiles e.Hyperthermophiles
c. Psychrophiles
9. 9. All of the following are true about microbes and a. Microbes have mecha-
temperature EXCEPT: nisms to control their tem-
a. Microbes have mechanisms to control their temper- perature.
ature.
b. Temperature affects the average rate of molecular
motion.
c. Changes in temperature affect membrane fluidity.
d. Changes in temperature affect transport.
e. Every organism has an optimum temperature for
growth.
10. 10. Psychrophiles favor the cold since their mem- b. unsaturated fatty acids
branes are more fluid at low temperature as a result
of the high proportion of __________ present.
Study online at https://quizlet.com/_16ltqc
1. 1. __________ have evolved to survive multiple extreme b. Extremophiles
environments.
a. Psychrophiles d. Thermophiles
b. Extremophiles e. Acidophiles
c. Halophiles
2. 2. The membrane needs to remain __________ so that c. fluid
it can expand as cells grow larger and so proteins
needed for solute transport can be inserted into the
membrane.
a. rigid d. hypertonic
b. warm e. polarized
c. fluid
3. 3. The general result of the Arrhenius equation is that b. 10
growth rate roughly doubles for every __________°C rise
in temperature.
a. 5 d. 20
b. 10 e. 25
c. 15
4. 4. The fastest growth rate for a species occurs at tem- d. proteins
peratures where a cell's __________ work most efficient-
ly.
a. lipids d. proteins
b. membranes e. polysaccharides
c. nucleic acids
5. 5. Human pathogens are: c. mesophiles
a. halophiles d. thermophiles
b. psychrophiles e. extreme thermophiles
c. mesophiles
, Micro Ch 5 Test Banks
Study online at https://quizlet.com/_16ltqc
6. 6. __________ are prominent flora beneath icebergs in b. Psychrophiles
the Arctic and Antarctic.
a. Barophiles d. Thermophiles
b. Psychrophiles e. Acidophiles
c. Mesophiles
7. 7. __________ enzymes are stable in part because they c. Thermophilic
contain relatively low amounts of the amino acid
glycine.
a. Psychrophilic d. Halophilic
b. Acidophilic e. Barophilic
c. Thermophilic
8. 8. __________ grow at temperatures as high as 121°C, e.Hyperthermophiles
which occur under extreme pressure.
a. Thermophiles d. Hyperpsychrophiles
b. Extreme halophiles e.Hyperthermophiles
c. Psychrophiles
9. 9. All of the following are true about microbes and a. Microbes have mecha-
temperature EXCEPT: nisms to control their tem-
a. Microbes have mechanisms to control their temper- perature.
ature.
b. Temperature affects the average rate of molecular
motion.
c. Changes in temperature affect membrane fluidity.
d. Changes in temperature affect transport.
e. Every organism has an optimum temperature for
growth.
10. 10. Psychrophiles favor the cold since their mem- b. unsaturated fatty acids
branes are more fluid at low temperature as a result
of the high proportion of __________ present.
