Question 1

Which of the following structures is found in both prokaryotic and eukaryotic cells and is responsible for synthesizing proteins from mRNA?

Accepted Answer

Ribosome

Question 2

A scientist observes a cell with a double membrane-bound nucleus, mitochondria, and a cell wall made of cellulose. Which type of cell is being observed?

Accepted Answer

Plant cell

Question 3

Which organelle is primarily responsible for detoxifying harmful substances and synthesizing lipids in eukaryotic cells?

Accepted Answer

Smooth endoplasmic reticulum

Question 4

A mutation disrupts the function of microtubules in a cell. Which cellular process would be most directly affected?

Accepted Answer

Cell movement and division

Question 5

Which equation best represents the relationship between a cell's surface area ($SA$) and its volume ($V$) for a spherical cell?

Accepted Answer

$SA = 4 \pi r^2$, $V = \frac{4}{3} \pi r^3$

Question 6

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, allowing efficient exchange of materials.

Question 7

A cell is observed to have fimbriae, a nucleoid region, and a glycocalyx. Which type of cell is this most likely to be?

Accepted Answer

Prokaryotic cell

Question 8

Which organelle is responsible for sorting, modifying, and packaging proteins for secretion or delivery to other organelles?

Accepted Answer

Golgi apparatus

Question 9

A patient has a genetic disorder that affects the function of lysosomes. Which cellular process is most likely impaired?

Accepted Answer

Hydrolysis of macromolecules and removal of cellular waste

Question 10

Which structure in plant cells allows for direct cytoplasmic exchange between adjacent cells?

Accepted Answer

Plasmodesmata

Question 11

Which of the following is NOT a function of the plasma membrane?

Accepted Answer

Synthesizing proteins from mRNA

Question 12

Which organelle contains its own DNA and is involved in cellular respiration?

Accepted Answer

Mitochondrion

Question 13

A cell is unable to maintain its shape and internal organization due to a defect in its cytoskeleton. Which component is most likely affected?

Accepted Answer

Microfilaments and microtubules

Question 14

Which of the following statements about the nuclear envelope is correct?

Accepted Answer

It is a double membrane structure with pores that regulate transport between the nucleus and cytoplasm.

Question 15

Which organelle in plant cells is responsible for converting solar energy into chemical energy stored in sugar molecules?

Accepted Answer

Chloroplast

Question 16

Which of the following best describes the function of peroxisomes?

Accepted Answer

Break down fatty acids and detoxify harmful substances by converting hydrogen peroxide to water

Question 17

A cell is observed to have a rigid structure outside its plasma membrane, composed mainly of polysaccharides. What is this structure called?

Accepted Answer

Cell wall

Question 18

Which of the following is a function of the Golgi apparatus in eukaryotic cells?

Accepted Answer

Modification, sorting, and packaging of proteins and lipids

Question 19

Which of the following structures is unique to prokaryotic cells and not found in eukaryotic cells?

Accepted Answer

Nucleoid region

Question 20

If a cell's plasma membrane is damaged and loses its selective permeability, which of the following is most likely to occur?

Accepted Answer

Uncontrolled movement of substances in and out of the cell, disrupting homeostasis

Cell Structure and Function: Prokaryotic and Eukaryotic Cells

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