Question 1

Which of the following best describes the three main parts of a typical eukaryotic cell and their general functions?

Accepted Answer

Plasma membrane (controls entry/exit), cytoplasm (houses organelles), nucleus (stores genetic material)

Question 2

A red blood cell is placed in a solution and begins to shrink. Which type of solution is it in, and what is the underlying mechanism?

Accepted Answer

Hypertonic; water moves out of the cell by osmosis

Question 3

Which of the following best explains the difference between cytosol and cytoplasm?

Accepted Answer

Cytosol is the fluid portion of the cytoplasm, while cytoplasm includes the cytosol and organelles

Question 4

According to the fluid mosaic model, which statement best describes the structure of the plasma membrane?

Accepted Answer

A dynamic bilayer of phospholipids with proteins and carbohydrates embedded or attached

Question 5

Which of the following is true regarding primary active transport?

Accepted Answer

It directly uses ATP to move molecules against their concentration gradient

Question 6

A patient is given intravenous fluids that are hypotonic relative to their blood plasma. What is the most likely effect on their red blood cells?

Accepted Answer

Cells will swell and may burst due to water influx

Question 7

Which organelle is primarily responsible for ATP production, and what is its structural feature that supports this function?

Accepted Answer

Mitochondrion; inner membrane folded into cristae

Question 8

Which of the following best describes the role of the cytoskeleton in cellular motion?

Accepted Answer

It provides structural support and enables movement through microfilaments, intermediate filaments, and microtubules

Question 9

Which of the following correctly matches the organelle with its function?

Accepted Answer

Lysosome: digestion of cellular debris

Question 10

During which phase of the cell cycle does DNA replication occur, and what is the significance of this event?

Accepted Answer

S phase of interphase; ensures each daughter cell receives an identical set of chromosomes

Question 11

Which of the following best describes the relationship among chromatin, chromosomes, and sister chromatids?

Accepted Answer

Chromatin condenses to form chromosomes, which consist of two sister chromatids after DNA replication

Question 12

Which process is responsible for the movement of large particles, such as bacteria, into a cell, and what is the energy requirement?

Accepted Answer

Phagocytosis; requires ATP

Question 13

A cell is observed to have an extensive rough endoplasmic reticulum. What is the most likely function of this cell?

Accepted Answer

Synthesis of large amounts of proteins for export

Question 14

Which of the following best describes secondary active transport?

Accepted Answer

It uses the energy stored in an ion gradient created by primary active transport to move another substance

Question 15

Which of the following is a function of the nucleolus?

Accepted Answer

Synthesis of ribosomal RNA (rRNA) and assembly of ribosomal subunits

Question 16

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

Accepted Answer

Organization of the mitotic spindle during cell division

Question 17

Which of the following best explains the difference between mitosis and cytokinesis?

Accepted Answer

Mitosis divides the nucleus and genetic material; cytokinesis divides the cytoplasm

Question 18

Which of the following is a correct sequence of events during interphase?

Accepted Answer

G1 (cell growth), S (DNA replication), G2 (preparation for mitosis)

Question 19

Which of the following best describes the function of carbohydrates in the plasma membrane?

Accepted Answer

They serve as recognition sites for cell-cell interactions

Question 20

A cell is exposed to a toxin that inhibits all forms of vesicular transport. Which of the following processes would be directly impaired?

Accepted Answer

Exocytosis of neurotransmitters

Chapter 3: The Cell – Structure, Function, and Processes

Study Guide - Practice Questions