1 - Autotroph is the term used to describe organisms that A) perform fermentatio

Question

1 - Autotroph is the term used to describe organisms that

A) perform fermentation or anaerobic respiration.

B) derive their metabolic energy from reducing CO2.

C) derive their carbon from CO2.

D) can only exist in the sunlight.

2 - Denitrification uses nitrate (NO3-) as an electron acceptor, making it an example of:

A) fermentations

B) chemolithotrophy

C) photoheterotrophy

D) anaerobic respiration

3 - An Archaea organism utilizes CO2 as an electron acceptor in chemolithotrophy, with hydrogen as an electron donor. What type of organism is this likely to be?

A) Aerobic chemoorganotroph

B) Lactic acid bacterium

C) Purple sulfur bacterium

D) Methanogen

4 - Which of these provides the substrate (food source) for propionic acid bacteria in the production of Swiss cheese?

A) Lactic acid bacteria

B) Ammonia oxidizing bacteria

C) Clostridia fermenting amino acids via Strickland reactions

D) Sulfate reducing bacteria

5 - What does the reduction potential measure?

A) the tendency of a compound to donate electrons

B) the hydrolytic capability of an antibiotic

C) the ability of an enzyme to reduce activation energy

D) how many carbon atoms the molecule contains

Explanation / Answer

1. Option D is correct.

2. Option B is coreect.

3. Option D is correct.

4. Option A .lactic acid bacteria.

5. Option A is correct.

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