Question 1

Which of the following best describes the primary function of the nucleolus within a eukaryotic cell?

Accepted Answer

It synthesizes ribosomal RNA (rRNA) and assembles ribosome subunits.

Question 2

A patient is diagnosed with a genetic disorder that impairs the function of lysosomes. Which cellular process is most likely to be directly affected?

Accepted Answer

Intracellular digestion of macromolecules

Question 3

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

Accepted Answer

Rough endoplasmic reticulum

Question 4

A cell is observed to have an unusually high number of mitochondria. What is the most likely explanation for this observation?

Accepted Answer

The cell has a high energy demand and requires increased ATP production.

Question 5

Which of the following best describes the function of microvilli on the surface of epithelial cells in the small intestine?

Accepted Answer

Increase surface area to enhance absorption of nutrients

Question 6

If a mutation disrupts the structure of microtubules, which cellular process would be most directly affected?

Accepted Answer

Chromosome separation during cell division

Question 7

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

Accepted Answer

Golgi apparatus

Question 8

A scientist observes a cell with abundant smooth endoplasmic reticulum. Which function is this cell most likely specialized for?

Accepted Answer

Synthesis of lipids and detoxification of drugs

Question 9

Which of the following structures is composed primarily of actin and is involved in cell movement and shape changes?

Accepted Answer

Microfilaments

Question 10

A cell is unable to detoxify hydrogen peroxide ($$\mathrm{H_2O_2}$$), leading to its accumulation. Which organelle is most likely defective?

Accepted Answer

Peroxisome

Question 11

Which of the following best describes the role of the plasma (cell) membrane?

Accepted Answer

Regulates the movement of substances into and out of the cell

Question 12

During mitosis, which structure organizes the mitotic spindle and is essential for chromosome movement?

Accepted Answer

Centrioles

Question 13

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

Accepted Answer

Synthesis of proteins

Question 14

A cell is observed to have defective ribosomes. Which process would be most directly impaired?

Accepted Answer

Translation of mRNA into proteins

Question 15

Which of the following best describes chromatin?

Accepted Answer

A complex of DNA and proteins found in the nucleus

Question 16

Which cytoskeletal element provides tensile strength and helps resist mechanical stress in cells?

Accepted Answer

Intermediate filaments

Question 17

A sperm cell uses which structure for motility?

Accepted Answer

Flagellum

Question 18

Which of the following is the fluid portion of the cytoplasm in which organelles are suspended?

Accepted Answer

Cytosol

Question 19

Which organelle is most directly involved in the breakdown and recycling of worn-out cellular components?

Accepted Answer

Lysosome

Question 20

Which of the following best explains why the nuclear envelope contains pores?

Accepted Answer

To allow the exchange of materials such as RNA and proteins between the nucleus and cytoplasm

Cell Structures and Their Functions: Study Guide for Anatomy & Physiology

스터디 가이드 - 연습 문제