Q: Which equation correctly represents the process of aerobic respiration in microbes?

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

Question 1

Which of the following best describes the difference between catabolism and anabolism in microbial metabolism?

Accepted Answer

Catabolism breaks down large molecules into small ones, releasing energy, while anabolism uses energy to build large molecules from small ones.

Question 2

Which equation correctly represents the process of aerobic respiration in microbes?

Accepted Answer

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

Question 3

A polluted river is contaminated with petroleum hydrocarbons. Which microbial process is most relevant for cleaning up this pollution?

Accepted Answer

Bioremediation

Question 4

Which of the following statements about metabolic pathways is correct?

Accepted Answer

Each step in a metabolic pathway is catalyzed by a specific enzyme.

Question 5

Which law of thermodynamics states that energy can be transferred and transformed, but cannot be created or destroyed?

Accepted Answer

First law of thermodynamics

Question 6

During glycolysis, what is the net gain of ATP molecules per molecule of glucose?

Accepted Answer

$$2$$

Question 7

Which of the following is a correct description of chemolithotrophs?

Accepted Answer

They use reduced inorganic substances as an electron source.

Question 8

In the electron transport chain, what is the primary function of ATP synthase?

Accepted Answer

To convert ADP and inorganic phosphate into ATP using the proton motive force

Question 9

Which of the following is a terminal electron acceptor in anaerobic respiration?

Accepted Answer

$$\mathrm{NO_3$^-}$$

Question 10

Why is the regeneration of NAD+ important during fermentation?

Accepted Answer

It allows glycolysis to continue by providing an electron acceptor.

Question 11

Which of the following best describes the Calvin-Benson cycle?

Accepted Answer

It is a pathway used by autotrophs to fix $$\mathrm{CO_2$}$$ into organic molecules.

Question 12

Which of the following is NOT a product of the light reactions in oxygenic photosynthesis?

Accepted Answer

Glucose

Question 13

A bacterium that uses light as an energy source and $$\mathrm{CO_2$} as a $$carbon source is classified as a:

Accepted Answer

Photoautotroph

Question 14

Which of the following statements about anabolic and catabolic pathways is TRUE?

Accepted Answer

They are often physically separated and use different cofactors.

Question 15

Which of the following is a common intermediate (precursor metabolite) used in biosynthetic pathways?

Accepted Answer

Pyruvate

Question 16

A microbe that uses organic molecules as both its energy and electron source is classified as a:

Accepted Answer

Chemoorganoheterotroph

Question 17

Which of the following best explains why enzymes are essential for metabolic reactions?

Accepted Answer

They lower the activation energy required for reactions to proceed.

Question 18

During the nitrogen cycle, which microbial process converts atmospheric $$\mathrm{N_2$}$$ into ammonia ($$\mathrm{NH_3$}$$)?

Accepted Answer

Nitrogen fixation

Question 19

Which of the following is a key difference between oxygenic and anoxygenic phototrophy?

Accepted Answer

Oxygenic phototrophy generates oxygen as a byproduct, while anoxygenic phototrophy does not.

Question 20

A patient is diagnosed with a bacterial infection that is resistant to antibiotics targeting anabolic pathways. Which of the following best explains why these antibiotics are effective?

Accepted Answer

They inhibit biosynthetic reactions required for cell growth and division.

Microbial Metabolism: Pathways, Energy, and Biosynthesis

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