Question 1

Which of the following statements best explains why prokaryotic cells are generally smaller than eukaryotic cells?

Accepted Answer

Prokaryotic cells rely on diffusion for nutrient uptake, and a high surface area-to-volume ratio allows for efficient transport.

Question 2

Which of the following is a key structural difference between the cell walls of bacteria and archaea?

Accepted Answer

Bacteria have cell walls made of peptidoglycan, while archaea have cell walls made of pseudopeptidoglycan.

Question 3

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

Accepted Answer

The cell will lose water and undergo plasmolysis.

Question 4

Which of the following best describes the function of bacterial fimbriae?

Accepted Answer

Adhesion to surfaces and establishment of biofilms.

Question 5

Which transport mechanism requires energy and can move substances against their concentration gradient?

Accepted Answer

Active transport

Question 6

A Gram-negative bacterium is more resistant to penicillin than a Gram-positive bacterium. Which structural feature is primarily responsible for this?

Accepted Answer

Presence of an outer membrane containing porins

Question 7

Which of the following best describes the arrangement and function of the phospholipid bilayer in prokaryotic plasma membranes?

Accepted Answer

Hydrophilic heads face outward, hydrophobic tails face inward, creating a selectively permeable barrier.

Question 8

Which of the following is NOT a function of the prokaryotic glycocalyx?

Accepted Answer

Facilitating motility

Question 9

Which of the following statements about binary fission in prokaryotes is correct?

Accepted Answer

It produces two genetically identical daughter cells.

Question 10

Which of the following genera are known to produce endospores that are highly resistant to environmental stresses?

Accepted Answer

Bacillus and Clostridium

Question 11

A patient sample is stained using the Gram stain technique. The cells appear pink under the microscope. Which of the following is true about these cells?

Accepted Answer

They have a thin peptidoglycan layer and an outer membrane rich in lipids.

Question 12

Which of the following best explains why acid-fast bacteria do not stain well with the conventional Gram stain?

Accepted Answer

Their cell walls contain a waxy layer rich in mycolic acid that resists the Gram stain.

Question 13

Which of the following structures is responsible for protein synthesis in prokaryotic cells?

Accepted Answer

Ribosome

Question 14

Which of the following best describes the genetic material of most prokaryotic cells?

Accepted Answer

A single circular chromosome located in the nucleoid region

Question 15

Which of the following is a real-world application of understanding the differences between Gram-positive and Gram-negative bacteria?

Accepted Answer

Choosing the appropriate antibiotic for a bacterial infection

Question 16

Which of the following best describes the function of porins in Gram-negative bacteria?

Accepted Answer

They form non-selective channels that allow small molecules to enter the cell.

Question 17

Which of the following best explains why Mycoplasma species are pleomorphic?

Accepted Answer

They lack a cell wall and have a sterol-enriched plasma membrane.

Question 18

Which of the following is a function of the prokaryotic cytoskeleton?

Accepted Answer

Providing scaffolding for cell division and organizing the cell wall

Question 19

A bacterium with peritrichous flagella would be best described as:

Accepted Answer

Having flagella distributed all over the cell surface

Question 20

Which of the following is true regarding the process of sporulation in Bacillus and Clostridium species?

Accepted Answer

It allows the cell to survive harsh conditions by forming a metabolically inactive endospore.

Introduction to Prokaryotic Cells: Structure, Function, and Clinical Relevance

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