Q: Which of the following equations best represents the movement of water during osmosis?

$$\text{Water moves from an area of low solute concentration to high solute concentration}$$

Question 1

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

Accepted Answer

Prokaryotic cells have a single circular chromosome and lack histones.

Question 2

A bacterium is observed to have a thick peptidoglycan layer and retains the crystal violet stain after Gram staining. Which structure is most likely present in its cell wall?

Accepted Answer

Teichoic acids

Question 3

Which bacterial shape is described as helical and flexible, and moves by means of axial filaments?

Accepted Answer

Spirochete

Question 4

A pathogenic bacterium is able to evade phagocytosis due to a well-organized, closely attached structure outside its cell wall. What is this structure called?

Accepted Answer

Capsule

Question 5

Which arrangement describes cocci bacteria found in clusters?

Accepted Answer

Staphylococci

Question 6

What is the primary function of the outer membrane in Gram-negative bacteria?

Accepted Answer

Protection from phagocytes, complement, and antibiotics

Question 7

Which of the following is a function of the glycocalyx in bacteria?

Accepted Answer

Contributes to virulence by preventing phagocytosis

Question 8

A bacterium is placed in a hypertonic solution. What is the expected outcome?

Accepted Answer

Water moves out of the cell, causing plasmolysis.

Question 9

Which process allows bacteria to move nutrients from low concentration to high concentration, requiring ATP?

Accepted Answer

Active transport

Question 10

Which bacterial structure is involved in the transfer of DNA from one cell to another?

Accepted Answer

Conjugation pili

Question 11

A patient is infected with a bacterium that causes fever and shock due to the release of an endotoxin. Which component is responsible?

Accepted Answer

Lipid A

Question 12

Which of the following equations best represents the movement of water during osmosis?

Accepted Answer

$$	ext{Water moves from an area of low solute concentration to high solute concentration}$$

Question 13

Which bacterial inclusion is responsible for buoyancy in aquatic environments?

Accepted Answer

Gas vacuoles

Question 14

Which antibiotic targets the bacterial cell wall by inhibiting the formation of peptide cross-bridges in peptidoglycan?

Accepted Answer

Penicillin

Question 15

A bacterium with a wall-less state after exposure to lysozyme is called:

Accepted Answer

Protoplast

Question 16

Which of the following is a multi-step process that occurs only in prokaryotes, involving the chemical modification of a molecule as it is transported into the cell?

Accepted Answer

Group translocation

Question 17

Which bacterial genus is known for producing highly resistant endospores that can survive extreme conditions?

Accepted Answer

Bacillus

Question 18

Which structure is responsible for the corkscrew movement of spirochetes?

Accepted Answer

Axial filaments

Question 19

Which bacterial shape is most commonly found in halophilic archaea, as shown in the provided images?

Accepted Answer

Rectangular

Question 20

Which of the following best describes the function of teichoic acids in Gram-positive bacteria?

Accepted Answer

They regulate movement of cations and provide antigenic specificity.

Functional Anatomy of Prokaryotic Cells: Structure, Function, and Diversity

Study Guide - Practice Questions

Study Guide - Flashcards