Q: Which of the following equations correctly represents the breakdown of ATP to release energy in the cell?

$$\mathrm{ATP} \rightarrow \mathrm{ADP} + \mathrm{P_i} + \text{energy}$$

Question 1

Which of the following best describes the function of the plasma membrane in a eukaryotic cell?

Accepted Answer

It acts as a barrier to the environment and regulates movement in and out of the cell.

Question 2

The phospholipid bilayer of the plasma membrane is described as amphipathic. What does this mean?

Accepted Answer

It has both hydrophilic heads and hydrophobic tails.

Question 3

A patient has a genetic mutation that prevents the formation of microvilli in their intestinal cells. Which physiological process would be most directly affected?

Accepted Answer

Digestion and absorption of nutrients

Question 4

Which organelle is known as the 'powerhouse of the cell' and is responsible for producing ATP through aerobic metabolism?

Accepted Answer

Mitochondria

Question 5

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 6

A scientist observes a cell with a large number of ribosomes attached to its endoplasmic reticulum. What is the primary function of this organelle?

Accepted Answer

Synthesis of proteins

Question 7

Which organelle is responsible for modifying, packaging, and sorting proteins for delivery to other parts of the cell or for secretion?

Accepted Answer

Golgi apparatus

Question 8

If a cell's lysosomes are nonfunctional, which process would be most directly impaired?

Accepted Answer

Breakdown of worn-out organelles and foreign substances

Question 9

Which structure is primarily involved in maintaining the cell's shape and providing support for organelle movement?

Accepted Answer

Cytoskeleton

Question 10

A sperm cell uses a flagellum for movement. Which other cellular structure shares a similar function in respiratory tract cells?

Accepted Answer

Cilia

Question 11

Which of the following equations correctly represents the breakdown of ATP to release energy in the cell?

Accepted Answer

$$\mathrm{ATP} ightarrow \mathrm{ADP} + \mathrm{P_i} + 	ext{energy}$$

Question 12

Which phase of mitosis is characterized by the alignment of chromosomes along the equator of the cell?

Accepted Answer

Metaphase

Question 13

A cell is observed to have two distinct nuclei forming at opposite ends. Which stage of mitosis is this cell most likely in?

Accepted Answer

Telophase

Question 14

Which organelle is responsible for the synthesis and storage of glycogen in skeletal muscle cells?

Accepted Answer

Smooth endoplasmic reticulum

Question 15

Which of the following best explains why the plasma membrane is described as 'selectively permeable'?

Accepted Answer

It allows some substances to pass while restricting others.

Question 16

A cell is exposed to a toxin that disrupts the function of its Golgi apparatus. Which cellular process would be most affected?

Accepted Answer

Modification and packaging of proteins for secretion

Question 17

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

Accepted Answer

Synthesizing proteins

Question 18

During which stage of the cell cycle does the cell spend most of its life performing normal functions?

Accepted Answer

Interphase

Question 19

Which organelle contains the genetic blueprint for protein synthesis and is surrounded by a double membrane with pores?

Accepted Answer

Nucleus

Question 20

A cell is observed undergoing cytokinesis. What is occurring during this process?

Accepted Answer

The division of the cytoplasm to form two distinct cells

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