Q: Which of the following equations correctly represents the net reaction of glycolysis?

$$\text{Glucose} + 2 \text{ATP} \rightarrow 2 \text{Pyruvate} + 4 \text{ATP} + 2 \text{NADH}$$

Q: Which of the following is the correct sequence for the flow of genetic information in a cell?

$$\text{DNA} \rightarrow \text{RNA} \rightarrow \text{Protein}$$

Question 1

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

Accepted Answer

Catabolism releases energy by oxidation of molecules, while anabolism uses energy to synthesize macromolecules.

Question 2

During aerobic respiration, what is the final electron acceptor in the electron transport chain, and what is the main product formed?

Accepted Answer

Oxygen; water

Question 3

Which of the following equations correctly represents the net reaction of glycolysis?

Accepted Answer

$$	ext{Glucose} + 2 	ext{ATP} ightarrow 2 	ext{Pyruvate} + 4 	ext{ATP} + 2 	ext{NADH}$$

Question 4

A facultative anaerobe is inoculated into a tube of solid growth medium. Where would you expect to see the most growth and why?

Accepted Answer

Throughout the tube, but more at the top, because they grow better with oxygen but can grow without it.

Question 5

Which phase of the bacterial growth curve is characterized by a balance between cell division and cell death?

Accepted Answer

Stationary phase

Question 6

Which of the following statements about fermentation is TRUE?

Accepted Answer

Fermentation produces ATP by substrate-level phosphorylation and uses an organic molecule as the final electron acceptor.

Question 7

Which of the following best explains why high sugar or salt solutions are used to preserve food?

Accepted Answer

They create a hypertonic environment, causing plasmolysis in microbial cells.

Question 8

Which of the following is the correct sequence for the flow of genetic information in a cell?

Accepted Answer

$$	ext{DNA} ightarrow 	ext{RNA} ightarrow 	ext{Protein}$$

Question 9

Which of the following physical methods is most effective for sterilizing heat-sensitive medical equipment?

Accepted Answer

Ionizing radiation

Question 10

A disinfectant is tested using the disk-diffusion method and shows a large zone of inhibition against Staphylococcus aureus. What does this indicate?

Accepted Answer

The disinfectant is effective at killing or inhibiting Staphylococcus aureus.

Question 11

Which of the following microbial forms is most resistant to chemical biocides?

Accepted Answer

Prions

Question 12

Which of the following best describes the action of aldehydes as chemical disinfectants?

Accepted Answer

They inactivate proteins by cross-linking with functional groups.

Question 13

A patient develops a disease with a long incubation period, followed by mild symptoms, then severe symptoms, and finally recovery. Which type of disease progression does this represent?

Accepted Answer

Typical infectious disease progression

Question 14

Which of the following is an example of mutualism in the human microbiota?

Accepted Answer

E. coli in the gut producing vitamin K for the host while benefiting from nutrients

Question 15

Which of the following best describes the effect of a bacteriostatic agent on a bacterial population?

Accepted Answer

It inhibits growth and multiplication, but does not kill the cells.

Question 16

Which of the following is a correct statement about Koch’s postulates?

Accepted Answer

They require that the suspected pathogen must cause disease when introduced into a healthy host.

Question 17

Which of the following best explains why anaerobic bacteria generally grow more slowly than aerobic bacteria?

Accepted Answer

Anaerobic respiration yields less energy because the final electron acceptor is not oxygen.

Question 18

Which of the following is a trace element required for microbial growth?

Accepted Answer

Iron

Question 19

Which of the following best describes the role of tRNA during translation?

Accepted Answer

It carries amino acids to the ribosome and matches them to the mRNA codon.

Question 20

Which of the following is an example of a zoonosis?

Accepted Answer

Lyme disease transmitted from ticks to humans

Microbial Metabolism, Growth, Control, Genetics, and Disease Principles: Study Notes

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