Question 1

Which of the following is a characteristic that distinguishes prokaryotic cells from eukaryotic cells?

Accepted Answer

Presence of membrane-bound organelles

Question 2

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

Accepted Answer

Water will leave the cell, causing plasmolysis

Question 3

Which structure is responsible for horizontal gene transfer in bacteria?

Accepted Answer

Pili

Question 4

Gram-positive bacteria retain the crystal violet stain because:

Accepted Answer

They have a thick layer of peptidoglycan

Question 5

Which equation best describes the process of osmosis across a semipermeable membrane?

Accepted Answer

$$J = -D \frac{dC}{dx}$$

Question 6

A scientist observes a cell with a nucleus, mitochondria, and a cell wall composed of chitin. This cell is most likely:

Accepted Answer

A fungal cell

Question 7

Which of the following statements about viruses is correct?

Accepted Answer

Viruses lack cytoplasmic membranes and do not grow

Question 8

Which of the following best explains why Mycoplasma pneumoniae is often mistaken for a virus?

Accepted Answer

It lacks a cell wall and is very small

Question 9

Which of the following is NOT a function of the glycocalyx in prokaryotes?

Accepted Answer

Synthesis of ATP

Question 10

A bacterial cell is observed to move toward a chemical attractant. Which term describes this movement?

Accepted Answer

Positive chemotaxis

Question 11

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

Accepted Answer

Ribosome

Question 12

Which process requires the expenditure of ATP to move substances against their concentration gradient?

Accepted Answer

Active transport

Question 13

Which of the following is a unique feature of archaeal cell walls compared to bacterial cell walls?

Accepted Answer

Lack of peptidoglycan

Question 14

Which of the following best describes the endosymbiotic theory?

Accepted Answer

Eukaryotes originated from a symbiotic relationship between aerobic prokaryotes and larger anaerobic prokaryotes

Question 15

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

Accepted Answer

Anchoring organelles and facilitating cell movement

Question 16

A cell is observed to have a '9+2' arrangement of microtubules in its flagella. This cell is most likely:

Accepted Answer

A eukaryotic cell

Question 17

Which of the following is a major component of the bacterial cell wall that is targeted by many antibiotics?

Accepted Answer

Peptidoglycan

Question 18

Which of the following processes is used by eukaryotic cells to import large solid particles?

Accepted Answer

Phagocytosis

Question 19

Which of the following best describes the function of fimbriae in prokaryotes?

Accepted Answer

Attachment to surfaces and other cells

Question 20

A cell is placed in a solution where the concentration of solutes outside the cell is lower than inside. What type of solution is this, and what will happen to the cell?

Accepted Answer

Hypotonic; water will enter the cell, possibly causing it to burst

Cell Structure and Characteristics of Life in Microbiology

Study Guide - Practice Questions

Study Guide - Flashcards