Medical Microbiology Unit 3 Lesson 1 Exam
Questions and Answers
1. acidophile correct answer: a type of extremophile microorganism that can thrive and replicate
in very acidic conditions
2. autotrophs correct answer: organisms that can make their own food or energy from sunlight or
other chemicals
3. bacteriochlorophyll correct answer: a type of photopigment found in bacteria
4. halophile correct answer: a type of extremophile microorganism that can thrive and replicate in
very salty (or saline) environ- ments
5. heterotrophs correct answer: organisms that get their energy or food from eating or
consuming another organism
6. thermophile correct answer: a type of extremophile microorganism that can thrive and
replicate in extreme-temperature environments
7. 1) Select the best answer.
A thermophile would most likely live in a condition that is . correct
answer: hot
8. 2) Select the best answer.
What describes a halophile? correct answer: a type of extremophile that thrives in
saltwater
9. 3) Select the best answer.
An acidophile would most likely thrive in water that has a pH equal to
.
correct answer: 2.7
10. 4) Select the best answer.
Which microorganisms are the closest relatives to the earliest forms
of bacteria on Earth? correct answer: deeply branching bacteria
11. 5) Select the best answer.
What is the bacterial species, cyanobacteria, a type of? correct answer:
phototrophic bacteria
12. 6) Choose True or False. If False, choose the statement that
makes it True. Chlorophyll is a photosynthetic pigment that gives
bacteria its color. correct answer: False; Bacte- riochlorophyll is a photosynthetic
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Questions and Answers
1. acidophile correct answer: a type of extremophile microorganism that can thrive and replicate
in very acidic conditions
2. autotrophs correct answer: organisms that can make their own food or energy from sunlight or
other chemicals
3. bacteriochlorophyll correct answer: a type of photopigment found in bacteria
4. halophile correct answer: a type of extremophile microorganism that can thrive and replicate in
very salty (or saline) environ- ments
5. heterotrophs correct answer: organisms that get their energy or food from eating or
consuming another organism
6. thermophile correct answer: a type of extremophile microorganism that can thrive and
replicate in extreme-temperature environments
7. 1) Select the best answer.
A thermophile would most likely live in a condition that is . correct
answer: hot
8. 2) Select the best answer.
What describes a halophile? correct answer: a type of extremophile that thrives in
saltwater
9. 3) Select the best answer.
An acidophile would most likely thrive in water that has a pH equal to
.
correct answer: 2.7
10. 4) Select the best answer.
Which microorganisms are the closest relatives to the earliest forms
of bacteria on Earth? correct answer: deeply branching bacteria
11. 5) Select the best answer.
What is the bacterial species, cyanobacteria, a type of? correct answer:
phototrophic bacteria
12. 6) Choose True or False. If False, choose the statement that
makes it True. Chlorophyll is a photosynthetic pigment that gives
bacteria its color. correct answer: False; Bacte- riochlorophyll is a photosynthetic
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3
