Question 1

Which organelle is primarily responsible for synthesizing proteins, and where can it be found within the cell?

Accepted Answer

Ribosomes; found free-floating or attached to the rough endoplasmic reticulum

Question 2

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

Accepted Answer

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

Question 3

A scientist observes a cell with chromosomes aligned along the center of the cell. Which phase is this, and what is the structure called where the chromosomes align?

Accepted Answer

Metaphase; metaphase plate

Question 4

Which organelle is responsible for packaging and shipping proteins and lipids, and what is the fate of materials it processes?

Accepted Answer

Golgi apparatus; materials are released via secretory vesicles to lysosomes and peroxisomes

Question 5

A patient’s cells are unable to break down damaged organelles, leading to cellular dysfunction. Which organelle is most likely defective?

Accepted Answer

Lysosome

Question 6

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

Accepted Answer

It is a phospholipid bilayer that regulates the movement of substances into and out of the cell

Question 7

What is the main function of the nucleolus within the nucleus?

Accepted Answer

To synthesize ribosomes

Question 8

Which organelle is responsible for the oxidation of organic compounds and the generation of hydrogen peroxide?

Accepted Answer

Peroxisome

Question 9

A cell is observed with a contractile ring forming and the cytoplasm beginning to divide. Which stage of the cell cycle is this?

Accepted Answer

Cytokinesis

Question 10

Which cytoskeletal structure increases the surface area of cells for absorption, such as in the intestines?

Accepted Answer

Microvilli

Question 11

If a cell’s mitochondria are damaged, which cellular process would be most directly affected?

Accepted Answer

ATP production

Question 12

Which phase of mitosis is characterized by the reformation of the nuclear envelope and the appearance of the cleavage furrow?

Accepted Answer

Telophase

Question 13

A researcher is studying a cell with condensed chromosomes and no visible nuclear envelope. Which phase is the cell most likely in?

Accepted Answer

Prophase

Question 14

Which of the following best describes the role of centrioles during cell division?

Accepted Answer

They form microtubules and the spindle apparatus

Question 15

A mutation prevents the formation of the spindle apparatus in a cell. Which stage of mitosis would be directly affected?

Accepted Answer

Metaphase

Question 16

Which of the following is NOT a function of the smooth endoplasmic reticulum?

Accepted Answer

Synthesis of proteins

Question 17

Why is understanding the cell cycle important in oncology?

Accepted Answer

Because cancer is characterized by abnormal cell growth and division

Question 18

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

Accepted Answer

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

Question 19

A cell is observed with chromosomes being pulled toward opposite poles and the cell elongating. Which phase is this?

Accepted Answer

Anaphase

Question 20

Which of the following equations best represents the conversion of glucose to ATP in the mitochondria?

Accepted Answer

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

Cell Structure and the Cell Cycle: Foundations of Anatomy & Physiology

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