Q: Which equation correctly represents the relationship between surface area and volume for a cube-shaped cell?

$$\text{Surface Area} = 6a^2$, $$\text{Volume} = $$a^3$$

Question 1

Which of the following statements is NOT part of the classical cell theory?

Accepted Answer

Cells can spontaneously generate from non-living matter.

Question 2

A scientist is developing artificial cells to treat diabetes mellitus. Which feature must these artificial cells possess to function effectively in the human body?

Accepted Answer

Encapsulation of biological molecules for controlled release

Question 3

Which of the following structures is present in ALL cells, both prokaryotic and eukaryotic?

Accepted Answer

Plasma membrane

Question 4

Why are cells generally small rather than large? Choose the best explanation.

Accepted Answer

Small cells have a higher surface area to volume ratio, which facilitates efficient exchange of materials with the environment.

Question 5

A cell membrane is described as a 'fluid mosaic model.' What does this mean?

Accepted Answer

The membrane consists of a flexible lipid bilayer with embedded proteins that can move laterally.

Question 6

Which of the following would increase the fluidity of a cell membrane at low temperatures?

Accepted Answer

Increasing the proportion of unsaturated fatty acids in phospholipids

Question 7

A mutation causes a cell to lack cholesterol in its plasma membrane. What is the most likely consequence?

Accepted Answer

The membrane will be less able to regulate its fluidity, especially at temperature extremes.

Question 8

Which of the following is a function of the plasma membrane?

Accepted Answer

Regulation of exchange with the environment

Question 9

Which cell junction is unique to plant cells and allows the passage of water and small solutes between adjacent cells?

Accepted Answer

Plasmodesmata

Question 10

A researcher observes a cell with the following features: no nucleus, circular DNA, and a cell wall. Which type of cell is being observed?

Accepted Answer

Prokaryotic cell

Question 11

Which of the following best describes the function of integral membrane proteins?

Accepted Answer

They span the lipid bilayer and are involved in transport and signaling.

Question 12

Which equation correctly represents the relationship between surface area and volume for a cube-shaped cell?

Accepted Answer

$$	ext{Surface Area} = 6a^2$, $$	ext{Volume} = $$a^3$$

Question 13

Which of the following is NOT a function of the extracellular matrix (ECM) in animal cells?

Accepted Answer

Synthesizing ATP for cellular energy

Question 14

Which of the following statements about the semi-permeable nature of the plasma membrane is correct?

Accepted Answer

It allows selective passage of certain molecules while restricting others.

Question 15

Which of the following is a similarity between prokaryotic and eukaryotic cells?

Accepted Answer

Both have a plasma membrane and ribosomes.

Question 16

A cell is observed to have tight junctions. What is the primary function of these structures?

Accepted Answer

Preventing leakage of extracellular fluid between adjacent cells

Question 17

Which of the following best describes the role of glycoproteins in the plasma membrane?

Accepted Answer

They serve as identification markers for cell-cell recognition.

Question 18

Which of the following organelles is responsible for separating different chemical reactions within a eukaryotic cell?

Accepted Answer

Membrane-bound organelles

Question 19

Which of the following best explains why cholesterol is important in the plasma membrane?

Accepted Answer

It stabilizes membrane fluidity across temperature changes.

Question 20

A cell is placed in a solution and water moves into the cell. What type of solution is the cell in?

Accepted Answer

Hypotonic

Cell Structure and Function: Foundations of General Biology

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