Question 1

Which of the following statements best describes the difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus surrounded by a membrane, whereas prokaryotic cells lack a true nucleus.

Question 2

Which scientist is credited with disproving the theory of spontaneous generation using a swan-neck flask experiment?

Accepted Answer

Louis Pasteur

Question 3

A bacterial cell is placed in a hypertonic solution. What is the most likely outcome?

Accepted Answer

The cell will lose water and shrink, a process known as plasmolysis.

Question 4

Which of the following is NOT a function of the bacterial capsule?

Accepted Answer

Site of ATP synthesis

Question 5

Which metabolic pathway is responsible for the complete oxidation of glucose to carbon dioxide and water in aerobic respiration?

Accepted Answer

Krebs cycle (citric acid cycle)

Question 6

A Gram-positive bacterium is treated with penicillin. Which cell wall component is targeted by this antibiotic?

Accepted Answer

Peptidoglycan

Question 7

Which of the following best describes chemolithoautotrophs?

Accepted Answer

Organisms that use inorganic compounds as an energy source and CO$$_2 as a $$carbon source

Question 8

Which structure is responsible for bacterial motility and is composed of flagellin protein?

Accepted Answer

Flagella

Question 9

During aerobic respiration, which molecule acts as the final electron acceptor?

Accepted Answer

Oxygen (O$$_2)$$

Question 10

Which of the following is a correct description of the function of ribosomes in bacterial cells?

Accepted Answer

Ribosomes synthesize proteins by translating mRNA.

Question 11

A patient is diagnosed with tuberculosis. Which genus of bacteria is responsible for this disease?

Accepted Answer

Mycobacterium

Question 12

Which of the following transport mechanisms requires energy in the form of ATP?

Accepted Answer

Active transport

Question 13

Which scientist developed the first successful vaccine against rabies?

Accepted Answer

Louis Pasteur

Question 14

Which of the following statements about endospores is TRUE?

Accepted Answer

Endospores are resistant to heat, desiccation, and chemicals.

Question 15

Which process is described by the equation $$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + ATP$$?

Accepted Answer

Aerobic respiration

Question 16

Which of the following is a function of the peptidoglycan layer in bacterial cell walls?

Accepted Answer

Protects against osmotic lysis

Question 17

Which of the following best explains why Gram-negative bacteria are generally more resistant to antibiotics than Gram-positive bacteria?

Accepted Answer

Gram-negative bacteria possess an outer membrane that restricts antibiotic entry.

Question 18

Which of the following is a correct pairing of a microbial process and its ecological role?

Accepted Answer

Decomposition – breakdown of organic matter into simpler compounds

Question 19

Which of the following statements about the plasma membrane of bacteria is correct?

Accepted Answer

It contains phospholipids and proteins that regulate transport.

Question 20

A bacterium is classified as a photoautotroph. Which of the following best describes its energy and carbon sources?

Accepted Answer

Light for energy, CO$$_2$$ for carbon

Fundamental Concepts in Microbiology: The Microbial World, Prokaryotic Cell Structure, and Microbial Metabolism

Study Guide - Practice Questions