Question 1

Which of the following is NOT considered one of the four fundamental processes of life shared by all living things?

Accepted Answer

Photosynthesis

Question 2

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 3

Which structure is responsible for the movement of bacteria and is composed of a basal body, hook, and filament?

Accepted Answer

Flagella

Question 4

Gram-negative bacteria differ from Gram-positive bacteria in which of the following ways?

Accepted Answer

Gram-negative bacteria possess an outer membrane containing lipopolysaccharide (LPS).

Question 5

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

Accepted Answer

They help bacteria adhere to surfaces and evade host immune responses.

Question 6

A scientist discovers a microorganism with the following characteristics: no nucleus, 70S ribosomes, cell wall lacking peptidoglycan, and membrane lipids with ether linkages. What is the most likely classification of this organism?

Accepted Answer

Archaeon

Question 7

Which of the following transport processes requires energy and moves substances against their concentration gradient?

Accepted Answer

Active transport

Question 8

Which component of the Gram-negative bacterial cell wall is responsible for symptoms such as fever and shock in infected patients?

Accepted Answer

Lipid A of lipopolysaccharide (LPS)

Question 9

Which of the following statements about eukaryotic flagella is TRUE?

Accepted Answer

They are composed of microtubules arranged in a '9+2' pattern.

Question 10

A bacterial cell is placed in a hypotonic solution. What will happen to the cell if it lacks a cell wall?

Accepted Answer

It will burst due to osmotic pressure.

Question 11

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

Accepted Answer

Anchoring organelles and maintaining cell shape

Question 12

Which organelle is responsible for ATP production in eukaryotic cells and contains its own DNA and 70S ribosomes?

Accepted Answer

Mitochondrion

Question 13

Which of the following best explains the endosymbiotic theory?

Accepted Answer

Eukaryotic cells formed from the union of small aerobic prokaryotes with larger anaerobic prokaryotes.

Question 14

Which of the following structures is found in both prokaryotic and eukaryotic cells and is essential for protein synthesis?

Accepted Answer

Ribosome

Question 15

A bacterial cell is observed to have a thick layer of peptidoglycan and teichoic acids. What color would it appear after a Gram stain?

Accepted Answer

Purple

Question 16

Which of the following is TRUE regarding the structure of archaeal cell walls?

Accepted Answer

They are composed of specialized polysaccharides and proteins.

Question 17

Which process is unique to eukaryotic cells and involves the engulfment of large particles by the cell membrane?

Accepted Answer

Endocytosis

Question 18

Which of the following statements about viruses is CORRECT?

Accepted Answer

Viruses replicate only inside host cells.

Question 19

Which of the following best describes the composition of the bacterial cytoplasmic membrane?

Accepted Answer

A phospholipid bilayer with integral and peripheral proteins

Question 20

A scientist is studying a cell that contains membrane-bound organelles, a nucleus, and 80S ribosomes. Which type of cell is being observed?

Accepted Answer

Eukaryotic cell

Cell Structure and Function: Microbiology Study Notes (Chapter 3)

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