Q: Which of the following equations represents oxygenic photosynthesis?

$$6CO_2 + 12H_2O + \text{light energy} \rightarrow C_6H_{12}O_6$ + 6O_2 + 6H_2O$$

Question 1

Which of the following best describes the process by which fatty acids are catabolized to generate ATP in microbial cells?

Accepted Answer

Fatty acids are converted to acetyl CoA, which enters the Krebs cycle.

Question 2

During protein catabolism, what is the fate of the amino group removed from amino acids?

Accepted Answer

It is removed by deamination and typically converted to ammonia.

Question 3

Which of the following is a product of the light-dependent reactions of photosynthesis?

Accepted Answer

ATP

Question 4

Compare cyclic and noncyclic photophosphorylation. Which statement is correct?

Accepted Answer

Cyclic photophosphorylation produces only ATP, while noncyclic produces both ATP and NADPH.

Question 5

What are the inputs and outputs of the Calvin-Benson cycle for the synthesis of one molecule of G3P?

Accepted Answer

Inputs: 3 CO2, 9 ATP, 6 NADPH; Output: 1 G3P

Question 6

Which term describes an organism that uses light as an energy source and CO2 as a carbon source?

Accepted Answer

Photoautotroph

Question 7

A bacterium that uses glucose as both its energy and carbon source is classified as a:

Accepted Answer

Chemoheterotroph

Question 8

Which of the following best explains why there are no known photosynthetic organisms that cause infection in humans?

Accepted Answer

Photosynthetic organisms require light for energy, which is not available inside the human body.

Question 9

Which of the following is required for both photosynthesis and respiration?

Accepted Answer

An electron transport chain

Question 10

In the catabolism of triglycerides, which pathway does glycerol enter after conversion?

Accepted Answer

Glycolysis

Question 11

Which of the following best describes an amphibolic pathway?

Accepted Answer

A pathway that functions in both catabolism and anabolism

Question 12

A mutation in a bacterium prevents the function of extracellular proteases. What is the most likely consequence?

Accepted Answer

The bacterium will be unable to hydrolyze proteins into amino acids for uptake.

Question 13

Which of the following equations represents oxygenic photosynthesis?

Accepted Answer

$$6CO_2 + 12H_2O + 	ext{light energy} ightarrow C_6H_{12}O_6$ + 6O_2 + 6H_2O$$

Question 14

How many molecules of CO2 are required to produce one molecule of glucose via the Calvin-Benson cycle?

Accepted Answer

6

Question 15

Which of the following is a real-life example of a chemoautotroph?

Accepted Answer

Nitrosomonas, which oxidizes ammonia for energy and uses CO2 as a carbon source

Question 16

Which of the following best describes the integration of catabolic and anabolic pathways in microbial metabolism?

Accepted Answer

Intermediates from catabolic pathways can be diverted into anabolic pathways for biosynthesis.

Question 17

A patient is diagnosed with a genetic disorder that prevents the conversion of pyruvate to acetyl-CoA. Which metabolic process will be directly impaired?

Accepted Answer

The Krebs cycle

Question 18

Which of the following is a correct description of photoheterotrophs?

Accepted Answer

They use light for energy and organic molecules as a carbon source.

Question 19

Which of the following is a product of the pentose phosphate pathway that is essential for nucleotide biosynthesis?

Accepted Answer

Pentose sugars

Question 20

A mutation in a photosynthetic bacterium prevents the splitting of water during photosynthesis. Which process will be directly affected?

Accepted Answer

Noncyclic photophosphorylation

Microbial Metabolism II: Catabolic and Anabolic Pathways, Photosynthesis, and Metabolic Diversity

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