Q: Which equation best represents the movement of water across a selectively permeable membrane during osmosis?

$$\text{Osmosis}: \text{Water moves from high concentration to low concentration across the membrane}$$

Question 1

Which of the following is the main feature that distinguishes prokaryotic cells from eukaryotic cells?

Accepted Answer

Lack of a membrane-bound nucleus

Question 2

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

Accepted Answer

The cell will swell and may burst due to osmotic lysis

Question 3

Which structure is responsible for the selective permeability of the prokaryotic cell?

Accepted Answer

Plasma membrane

Question 4

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

Accepted Answer

Attachment to surfaces and other cells

Question 5

Gram-positive bacteria are more susceptible to antibiotics like penicillin than Gram-negative bacteria. Which structural feature explains this difference?

Accepted Answer

Thick peptidoglycan layer in Gram-positive bacteria

Question 6

Which equation best represents the movement of water across a selectively permeable membrane during osmosis?

Accepted Answer

$$	ext{Osmosis}: 	ext{Water moves from high concentration to low concentration across the membrane}$$

Question 7

Which of the following statements about bacterial endospores is correct?

Accepted Answer

Endospores are resistant to heat, drying, and chemicals

Question 8

A scientist stains a bacterial sample and observes red cells under the microscope after applying carbolfuchsin and acid-alcohol. What type of bacteria is most likely present?

Accepted Answer

Acid-fast bacteria

Question 9

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

Accepted Answer

Energy production (ATP synthesis)

Question 10

Which process requires energy and moves substances against their concentration gradient across the plasma membrane?

Accepted Answer

Active transport

Question 11

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

Accepted Answer

Single circular chromosome in the nucleoid region

Question 12

Which cell wall component is unique to Gram-negative bacteria and contributes to their ability to evade certain antibiotics?

Accepted Answer

Lipopolysaccharides (LPS)

Question 13

Which of the following is a correct comparison between binary fission and mitosis?

Accepted Answer

Binary fission is simpler and faster than mitosis

Question 14

Which of the following structures is involved in the transfer of genetic material between bacterial cells during conjugation?

Accepted Answer

Pili

Question 15

Which of the following is a function of ribosomes in both prokaryotic and eukaryotic cells?

Accepted Answer

Protein synthesis

Question 16

A bacterium with a thick peptidoglycan layer and teichoic acids is most likely:

Accepted Answer

Gram-positive

Question 17

Which of the following best describes facilitated diffusion across the plasma membrane?

Accepted Answer

Movement of molecules from high to low concentration via transport proteins, without energy

Question 18

Which of the following is true about mycoplasmas?

Accepted Answer

They lack a cell wall and contain sterols in their plasma membrane

Question 19

Which bacterial appendage is primarily responsible for motility via rotation?

Accepted Answer

Flagella

Question 20

Which of the following best explains why acid-fast bacteria retain the primary stain after decolorization?

Accepted Answer

Their cell wall contains mycolic acid, which retains the dye

Functional Anatomy of Prokaryotic and Eukaryotic Cells: Microbiology Study Notes

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