Question 1

Which of the following best describes the function of the mitochondria in a cell?

Accepted Answer

It is the 'powerhouse' of the cell, producing most of the ATP.

Question 2

According to the fluid mosaic model, which component is primarily responsible for the dynamic nature of the plasma membrane?

Accepted Answer

Proteins embedded in the phospholipid bilayer

Question 3

A scientist observes a cell with abundant rough endoplasmic reticulum. What is the most likely function of this cell?

Accepted Answer

Synthesis and export of proteins

Question 4

Which cell junction type is most likely to be found in tissues that require impermeable barriers, such as the lining of the intestines?

Accepted Answer

Tight junctions

Question 5

If a cell's lysosomes are nonfunctional, which process would be most directly affected?

Accepted Answer

Intracellular digestion of macromolecules

Question 6

Which of the following best explains why the nuclear envelope allows some substances to pass through but not others?

Accepted Answer

It contains pores that selectively permit passage based on size and charge.

Question 7

A cell is observed to have many peroxisomes. Which function is this cell most likely specialized for?

Accepted Answer

Detoxification of harmful chemicals

Question 8

Which of the following is NOT a major region or part of a typical eukaryotic cell?

Accepted Answer

Cell wall

Question 9

Which organelle is responsible for packaging and shipping proteins to their final destination within or outside the cell?

Accepted Answer

Golgi apparatus

Question 10

A cell is found to have a large number of desmosomes. What is the most likely function of the tissue this cell is part of?

Accepted Answer

Anchoring cells together to resist mechanical stress

Question 11

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

Accepted Answer

It stabilizes the membrane and affects its fluidity.

Question 12

Which formula correctly represents the relationship between the surface area ($$A) $$and volume ($$V) of a $$spherical cell with radius $$r$$?

Accepted Answer

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

Question 13

Which of the following statements about the cytosol is correct?

Accepted Answer

It is a semitransparent fluid that suspends organelles and contains nutrients and dissolved substances.

Question 14

A mutation causes a cell to lack gap junctions. Which process would be most directly impaired?

Accepted Answer

Communication between adjacent cells

Question 15

Which organelle is most abundant in white blood cells due to their role in digesting foreign material?

Accepted Answer

Lysosomes

Question 16

Which of the following best describes the principle of complementarity in cell theory?

Accepted Answer

Cell activities are dictated by their structure (anatomy), which determines their function (physiology).

Question 17

Which process is most directly associated with the rough endoplasmic reticulum?

Accepted Answer

Synthesis and export of proteins

Question 18

If a cell's Golgi apparatus is damaged, which cellular process would be most affected?

Accepted Answer

Modification, packaging, and shipping of proteins

Question 19

Which of the following is a correct description of the nucleolus?

Accepted Answer

It is a small, dark structure inside the nucleus that produces ribosomal RNA.

Question 20

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

Accepted Answer

To maximize the surface area-to-volume ratio for efficient exchange of materials.

Cells and Tissues: Structure and Function in Anatomy & Physiology

Study Guide - Practice Questions