Q: Which of the following equations correctly represents the calculation for the surface area-to-volume ratio of a cube-shaped cell?

$$\frac{\text{surface area}}{\text{volume}}$$

Question 1

Which of the following is a key feature shared by all cells, both prokaryotic and eukaryotic?

Accepted Answer

A plasma membrane

Question 2

Which microscopy technique would be most appropriate to visualize the detailed internal structure of mitochondria?

Accepted Answer

Transmission electron microscopy (TEM)

Question 3

A scientist wants to isolate mitochondria from a cell homogenate. Which centrifugation condition should be used to pellet mitochondria, given that chloroplasts are about 10 times larger?

Accepted Answer

Use a lower centrifugal force and shorter time than for ribosomes

Question 4

Which of the following best explains why cells are generally small in size?

Accepted Answer

Smaller cells have a higher surface area-to-volume ratio, facilitating efficient exchange of materials.

Question 5

Which of the following structures is found in prokaryotic cells but not in eukaryotic animal cells?

Accepted Answer

Cell wall

Question 6

A cell is observed to have a plasma membrane, mitochondria, chloroplasts, and a Golgi apparatus. This cell is most likely:

Accepted Answer

A plant cell

Question 7

Which of the following best describes the function of the rough endoplasmic reticulum (RER)?

Accepted Answer

Protein synthesis for secretion and membrane insertion

Question 8

Which of the following equations correctly represents the calculation for the surface area-to-volume ratio of a cube-shaped cell?

Accepted Answer

$$\frac{	ext{surface area}}{	ext{volume}}$$

Question 9

Which of the following is NOT a function of the Golgi apparatus?

Accepted Answer

ATP production

Question 10

A mutation prevents the formation of microtubules in a cell. Which of the following processes would be most directly affected?

Accepted Answer

Vesicle transport from ER to Golgi

Question 11

Which of the following statements about the endosymbiont theory is correct?

Accepted Answer

Mitochondria and chloroplasts originated from engulfed prokaryotes.

Question 12

Which of the following is a function of peroxisomes in plant cells?

Accepted Answer

Breakdown of long-chain fatty acids and conversion of hydrogen peroxide to water

Question 13

Which of the following best describes the main structural difference between smooth and rough endoplasmic reticulum?

Accepted Answer

Rough ER has ribosomes attached to its surface, while smooth ER does not.

Question 14

Which of the following is a function of the central vacuole in plant cells?

Accepted Answer

Storage of water and maintenance of turgor pressure

Question 15

Which of the following structures is responsible for the movement of vesicles within eukaryotic cells?

Accepted Answer

Microtubules and motor proteins

Question 16

Which of the following is a correct statement about the extracellular matrix (ECM) in animal cells?

Accepted Answer

It is mainly composed of collagen and proteoglycans.

Question 17

Which of the following best explains why plant cells do not perform phagocytosis?

Accepted Answer

The rigid cell wall prevents engulfing large particles.

Question 18

Which of the following junctions allows for the direct passage of ions and small molecules between adjacent animal cells?

Accepted Answer

Gap junctions

Question 19

Which of the following best describes the function of lysosomes?

Accepted Answer

Digestive compartments containing hydrolytic enzymes

Question 20

Which of the following is a correct statement about ribosomes?

Accepted Answer

They are found in both prokaryotic and eukaryotic cells and are responsible for protein synthesis.

Topic2_Biol186_W2026 (2).pdf

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