Q: Which equation best represents the process of photosynthesis carried out by photosynthetic microbes?

$$6 \mathrm{CO}_2 + 6 \mathrm{H}_2\mathrm{O} + \text{light energy} \rightarrow C_6H_{12}O_6$ + 6 \mathrm{O}_2$$

Question 1

Which of the following statements best describes the difference between bacteria and archaea?

Accepted Answer

Bacteria are known to include some pathogens, while no known archaea are pathogenic.

Question 2

A scientist discovers a new microbe that is nonliving, can infect all types of organisms, and requires a host cell to replicate. To which group does this microbe most likely belong?

Accepted Answer

Virus

Question 3

Which of the following is the correct order of the hierarchical classification scheme used in taxonomy, from broadest to most specific?

Accepted Answer

Kingdom, Phylum, Class, Order, Family, Genus, Species

Question 4

A researcher is studying the human gut microbiome. Which of the following best defines a microbiome?

Accepted Answer

All the microorganisms and their genetic material present in a particular environment.

Question 5

Which of the following is an example of mutualism?

Accepted Answer

Bacteria in the human gut producing vitamins that benefit the host while receiving nutrients.

Question 6

During fermentation, which of the following products can be formed from sugars?

Accepted Answer

Alcohol, acids, and sometimes gases

Question 7

Which equation best represents the process of photosynthesis carried out by photosynthetic microbes?

Accepted Answer

$$6 \mathrm{CO}_2 + 6 \mathrm{H}_2\mathrm{O} + 	ext{light energy} ightarrow C_6H_{12}O_6$ + 6 \mathrm{O}_2$$

Question 8

A patient develops an infection after taking antibiotics that disrupt their normal gut flora. This is an example of:

Accepted Answer

Dysbiosis

Question 9

Which scientist is correctly matched with their major contribution to microbiology?

Accepted Answer

Louis Pasteur – Disproved spontaneous generation and developed pasteurization

Question 10

Which of the following best describes Koch’s postulates?

Accepted Answer

A series of steps used to prove that a specific microbe causes a specific disease.

Question 11

A microbiologist wants to isolate a single species of bacteria from a mixed culture. Which method should they use, and what is the goal?

Accepted Answer

Streak-plate method; to obtain isolated colonies of a single species

Question 12

Which of the following stains would you use to distinguish between two types of bacterial cell walls?

Accepted Answer

Gram stain

Question 13

Which type of microscopy would be most appropriate for visualizing the detailed internal structures of a virus particle?

Accepted Answer

Transmission electron microscopy (TEM)

Question 14

A student is observing a transparent microbe under a microscope but cannot see any details. What should they do to improve visibility?

Accepted Answer

Stain the microbe using a suitable dye

Question 15

Which of the following best defines a 'colony' in microbiology?

Accepted Answer

A visible mass of cells derived from a single parent cell

Question 16

Which of the following is the smallest on average?

Accepted Answer

Virus

Question 17

A hospital outbreak is traced to a contaminated water pump. Which scientist’s work laid the foundation for this type of epidemiological investigation?

Accepted Answer

John Snow

Question 18

Which of the following best describes the process of fixation in staining procedures?

Accepted Answer

Attaching cells to a slide and killing them to preserve structure

Question 19

Which of the following is NOT a function performed by bacteria and fungi in the environment?

Accepted Answer

Causing all known human diseases

Question 20

A scientist is classifying a newly discovered microbe. According to binomial nomenclature, which of the following is the correct way to write its scientific name?

Accepted Answer

Genus species (italicized or underlined)

Chapter 1: Introduction to Microbiology – Guided Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards