Q: Which equation correctly represents the surface area-to-volume ratio for a cube-shaped cell?

$$\frac{\text{Surface\ Area}}{\text{Volume}}$$

Question 1

Which of the following statements best explains why prokaryotic cells are limited in size compared to eukaryotic cells?

Accepted Answer

Most nutrients are obtained by diffusion, so a high surface area-to-volume ratio is required for efficient transport.

Question 2

A bacterium is observed to have a corkscrew motion and a spiral shape. Which term best describes its morphology?

Accepted Answer

Spirochete

Question 3

Which arrangement describes bacteria that form grapelike clusters?

Accepted Answer

Staphylococci

Question 4

During binary fission, what is the role of the septum?

Accepted Answer

It partitions the cell, eventually separating the two daughter cells.

Question 5

Which of the following is a key difference between bacterial and archaeal plasma membranes?

Accepted Answer

Archaea can form lipid monolayers, while bacteria form lipid bilayers.

Question 6

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

Accepted Answer

Presence of an outer membrane containing lipopolysaccharide

Question 7

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

Accepted Answer

They form nonspecific channels that allow small molecules to pass through the outer membrane.

Question 8

Which staining technique would you use to identify bacteria with a waxy cell wall containing mycolic acid?

Accepted Answer

Acid-fast stain

Question 9

A patient is infected with Mycobacterium tuberculosis. Why is a long, multidrug therapy required?

Accepted Answer

The waxy cell wall prevents drugs from easily crossing, making treatment difficult.

Question 10

Which of the following best describes the movement of water during osmosis in a hypertonic environment?

Accepted Answer

Water moves out of the cell, causing plasmolysis.

Question 11

Which equation correctly represents the surface area-to-volume ratio for a cube-shaped cell?

Accepted Answer

$$\frac{	ext{Surface\ Area}}{	ext{Volume}}$$

Question 12

Which of the following is NOT a function of membrane proteins in prokaryotic plasma membranes?

Accepted Answer

DNA replication

Question 13

Which type of active transport in prokaryotes uses ATP directly to move substances across the membrane?

Accepted Answer

Primary active transport

Question 14

A bacterium is found to be pleomorphic. What does this mean?

Accepted Answer

It can take on different forms, enhancing survival and transmission.

Question 15

Which external structure allows bacteria to adhere to surfaces and is important in biofilm formation?

Accepted Answer

Fimbriae

Question 16

Which of the following best describes the function of the glycocalyx capsule in bacteria?

Accepted Answer

It is a well-organized, tightly associated layer that protects against desiccation and antibiotics.

Question 17

Which of the following is true about endospores?

Accepted Answer

They are dormant structures that allow survival in harsh conditions.

Question 18

Which genus is NOT known for producing endospores?

Accepted Answer

Staphylococcus

Question 19

Which of the following best describes facilitated diffusion in prokaryotic cells?

Accepted Answer

Movement of substances along their concentration gradient with the help of membrane proteins.

Question 20

Which of the following is a correct description of the nucleoid in prokaryotic cells?

Accepted Answer

A region containing a single, circular chromosome.

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

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