Question 1

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

Accepted Answer

It is a selectively permeable boundary that controls the movement of substances into and out of the cell.

Question 2

Which type of membrane protein is primarily responsible for allowing cells to recognize each other and interact physically?

Accepted Answer

Cell-cell recognition proteins

Question 3

A patient is diagnosed with a genetic disorder that affects the function of desmosomes in epithelial cells. Which symptom would most likely be observed?

Accepted Answer

Cells easily separate from each other under mechanical stress.

Question 4

Which of the following best explains why potassium ($$K^+) is $$the key player in determining the resting membrane potential of a cell?

Accepted Answer

The concentration gradient and membrane permeability for $$K^+$$ are greater than for other ions.

Question 5

Which organelle is responsible for synthesizing steroid-based hormones such as sex hormones?

Accepted Answer

Smooth endoplasmic reticulum

Question 6

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

Accepted Answer

Secretion of large amounts of protein

Question 7

Which of the following best describes the role of the Golgi apparatus in a cell?

Accepted Answer

It modifies, concentrates, and packages proteins and lipids made at the rough ER.

Question 8

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

Accepted Answer

Synthesizing proteins

Question 9

A scientist observes a cell with a central vacuole, cell wall, and plastids. What type of cell is this most likely to be?

Accepted Answer

Plant cell

Question 10

Which of the following best describes facilitated diffusion?

Accepted Answer

Passive transport of large or charged molecules via membrane proteins.

Question 11

Which equation correctly represents the overall reaction for cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + 36ATP$$

Question 12

Which of the following structures is responsible for anchoring adjacent cells together, functioning like molecular 'velcro'?

Accepted Answer

Desmosomes

Question 13

Which process requires energy input from ATP to move substances against their concentration gradient?

Accepted Answer

Active transport

Question 14

A mutation causes a cell to lack functional lysosomes. Which cellular process would be most directly affected?

Accepted Answer

Digestion of cellular debris and foreign substances

Question 15

Which of the following statements about ribosomes is correct?

Accepted Answer

They consist of two subunits and are the site of protein synthesis.

Question 16

Which specialized membrane structure allows ions and small molecules to pass directly from one cell to another, especially in heart cells?

Accepted Answer

Gap junctions

Question 17

Which of the following is a function of the smooth endoplasmic reticulum?

Accepted Answer

Synthesis of cholesterol and phospholipids

Question 18

Which of the following best describes the role of microvilli on epithelial cells?

Accepted Answer

They increase the surface area for absorption.

Question 19

A cell is placed in a hypotonic solution. What will most likely happen to the cell?

Accepted Answer

It will gain water and swell.

Question 20

Which of the following statements about eukaryotic cells is true?

Accepted Answer

They contain a true nucleus and other membrane-bound organelles.

Cell Structure, Membrane Function, and Transport Mechanisms: Study Notes for Anatomy & Physiology

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