Question 1

Which statement best describes the Cell Theory as developed from Robert Hooke’s research?

Accepted Answer

Cells are the smallest units that perform all vital physiological functions and maintain homeostasis at the cellular level.

Question 2

Which organelle is responsible for producing ATP through aerobic metabolism, and what is the main equation for this process?

Accepted Answer

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

Question 3

A red blood cell is placed in a hypotonic solution. What will happen to the cell, and why?

Accepted Answer

It will swell and may lyse because water enters the cell by osmosis.

Question 4

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

Accepted Answer

They assemble amino acids into polypeptide chains during protein synthesis.

Question 5

What is the primary structural component of the plasma membrane, and what property does it confer?

Accepted Answer

Phospholipids; they create a selectively permeable barrier.

Question 6

During protein synthesis, what is the correct sequence of events from DNA to protein?

Accepted Answer

Transcription → Translation → Protein folding

Question 7

Which of the following is a function of the Golgi apparatus?

Accepted Answer

Packaging and modifying proteins for secretion via exocytosis.

Question 8

Carrier-mediated transport exhibits specificity. What does this mean in the context of membrane transport?

Accepted Answer

Each transport protein only binds and moves specific molecules or ions.

Question 9

The sodium-potassium exchange pump is an example of which type of transport, and what is the stoichiometry of ions moved?

Accepted Answer

Active transport; 3 Na$$^+$$ out, 2 K$$^+ in$$

Question 10

Which process describes the movement of water across a selectively permeable membrane from an area of low solute concentration to high solute concentration?

Accepted Answer

Osmosis

Question 11

A cell is placed in a hypertonic solution. What is the expected outcome for the cell?

Accepted Answer

It will shrink and become crenated as water leaves the cell.

Question 12

Which organelle contains hydrolytic enzymes and is responsible for breaking down damaged organelles and cellular debris?

Accepted Answer

Lysosome

Question 13

What is the role of the nucleolus within the nucleus?

Accepted Answer

It is the site of rRNA synthesis and ribosome subunit assembly.

Question 14

Which of the following best describes the difference between rough and smooth endoplasmic reticulum (ER)?

Accepted Answer

Rough ER has ribosomes and synthesizes proteins; smooth ER lacks ribosomes and synthesizes lipids and carbohydrates.

Question 15

Which of the following is NOT a function of the plasma membrane?

Accepted Answer

Synthesizing proteins for secretion

Question 16

During DNA replication, which enzyme is primarily responsible for adding complementary nucleotides to the growing DNA strand?

Accepted Answer

DNA polymerase

Question 17

Which phase of the cell cycle is the longest and involves the cell performing its normal functions and preparing for division?

Accepted Answer

Interphase

Question 18

What is the function of the glycocalyx found on the external surface of the plasma membrane?

Accepted Answer

Cell recognition, protection, and immune response

Question 19

Which type of bulk transport involves the cell 'drinking' extracellular fluid and dissolved nutrients?

Accepted Answer

Pinocytosis

Question 20

A mutation causes a cell to lose control over its growth and division, eventually invading surrounding tissues. What is this process called?

Accepted Answer

Metastasis

Introduction to Cells: Structure, Function, and Organelles

Study Guide - Practice Questions

Study Guide - Flashcards