Question 1

Which of the following statements best describes the principle of cell theory as it applies to human anatomy?

Accepted Answer

Cells are the smallest functioning units of life and all anatomical structures are built from them.

Question 2

A scientist observes a cell with a double membrane, nuclear pores, and loosely coiled DNA. Which organelle is being described?

Accepted Answer

Nucleus

Question 3

Which organelle is primarily responsible for the synthesis and modification of proteins that are destined for secretion from the cell?

Accepted Answer

Rough endoplasmic reticulum

Question 4

A patient is diagnosed with a genetic disorder that impairs the function of hydrolytic enzymes, leading to accumulation of cellular debris. Which organelle is most likely affected?

Accepted Answer

Lysosome

Question 5

Which of the following organelles is directly involved in cellular respiration and ATP synthesis, and contains cristae to increase surface area?

Accepted Answer

Mitochondrion

Question 6

A cell is observed to have an extensive network of microtubules and microfilaments. What is the primary function of these structures?

Accepted Answer

Providing shape, anchoring organelles, and enabling movement

Question 7

Which organelle acts as the 'post office' of the cell, sorting and packaging proteins and lipids for delivery to their destinations?

Accepted Answer

Golgi apparatus

Question 8

A cell specialized for absorption in the small intestine is likely to have which surface modification to increase its surface area?

Accepted Answer

Microvilli

Question 9

Which of the following is a non-membranous organelle responsible for protein synthesis, and can be found free in the cytoplasm or attached to the endoplasmic reticulum?

Accepted Answer

Ribosome

Question 10

A sperm cell uses a whip-like structure to propel itself toward an egg. Which organelle is responsible for this movement?

Accepted Answer

Flagellum

Question 11

Which of the following best explains why the compartmentalization of membranous organelles is essential for eukaryotic cell function?

Accepted Answer

It enables specialized environments for distinct biochemical reactions.

Question 12

A cell is exposed to a toxin that disrupts the function of the smooth endoplasmic reticulum. Which process would be most directly affected?

Accepted Answer

Detoxification of drugs and synthesis of steroids

Question 13

Which equation best represents the process of cellular respiration occurring in mitochondria?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} \rightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + \mathrm{ATP}$$

Question 14

A cell is unable to produce ribosomal RNA. Which structure is most likely malfunctioning?

Accepted Answer

Nucleolus

Question 15

Which of the following is NOT a function of the cytoskeleton?

Accepted Answer

Synthesizing proteins

Question 16

During an infection, white blood cells engulf bacteria and digest them. Which organelle is most directly involved in this process?

Accepted Answer

Lysosome

Question 17

Which of the following best describes the role of the plasma membrane in maintaining cellular homeostasis?

Accepted Answer

It regulates the movement of molecules into and out of the cell.

Question 18

A cell is observed to have many vesicles containing digestive enzymes. What is the most likely function of these vesicles?

Accepted Answer

Breakdown of damaged organelles and foreign substances

Question 19

Which organelle would be most abundant in a cell that requires large amounts of energy, such as a muscle cell?

Accepted Answer

Mitochondria

Question 20

Which of the following best explains why ribosomes are found both free in the cytoplasm and attached to the rough endoplasmic reticulum?

Accepted Answer

Free ribosomes synthesize proteins for use within the cell, while attached ribosomes synthesize proteins for export or for membranes.

Cell Theory and Cell Organelles: Structure and Function

Study Guide - Practice Questions

Study Guide - Flashcards