Question 1

Which of the following best describes the primary function of the cell membrane?

Accepted Answer

It regulates the movement of substances into and out of the cell.

Question 2

Which component of the cell membrane is primarily responsible for its fluidity and stability?

Accepted Answer

Cholesterol

Question 3

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

Accepted Answer

It will shrink as water leaves the cell.

Question 4

Which of the following transport processes requires ATP and moves substances against their concentration gradient?

Accepted Answer

Active transport

Question 5

Which equation best represents the net movement of water during osmosis?

Accepted Answer

$$J_{water} = -P_{water} (\Delta C_{water})$$

Question 6

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

Accepted Answer

Storing genetic material

Question 7

A patient with cystic fibrosis has thick mucus in the respiratory tract. This is primarily due to:

Accepted Answer

A genetic mutation preventing Cl$$^-$$ from leaving cells

Question 8

Which process involves the cell membrane engulfing large solid particles, such as bacteria, by extending pseudopods?

Accepted Answer

Phagocytosis

Question 9

Which of the following best describes facilitated diffusion?

Accepted Answer

Movement of substances from high to low concentration via carrier proteins without ATP

Question 10

Which of the following is an example of secondary active transport?

Accepted Answer

Na$$^+-$$glucose symporter in the small intestine

Question 11

Which of the following best explains why glucose cannot cross the cell membrane by simple diffusion?

Accepted Answer

Glucose is too large and polar to pass through the lipid bilayer.

Question 12

Which of the following statements about exocytosis is correct?

Accepted Answer

It is used to release substances such as hormones and enzymes from the cell.

Question 13

Which of the following best describes the role of clathrin in endocytosis?

Accepted Answer

It forms a protein coat that helps shape and internalize vesicles.

Question 14

Which of the following is a function of glycoproteins in the cell membrane?

Accepted Answer

Serving as identification markers for cell recognition

Question 15

A cell is placed in a solution and water moves into the cell, causing it to swell. What type of solution is the cell in?

Accepted Answer

Hypotonic

Question 16

Which of the following best describes the movement of Na$$^+$$ and glucose in the small intestine via a symporter?

Accepted Answer

Na$$^+$$ moves down its gradient, driving glucose against its gradient into the cell.

Question 17

Which of the following is NOT a characteristic of active transport?

Accepted Answer

Moves substances from high to low concentration

Question 18

Which process is used by white blood cells to engulf and destroy bacteria?

Accepted Answer

Phagocytosis

Question 19

Which of the following best describes the structure of the phospholipid bilayer?

Accepted Answer

Hydrophilic heads face outward, hydrophobic tails face inward

Question 20

Which of the following is a real-life example of receptor-mediated endocytosis?

Accepted Answer

Uptake of LDL cholesterol by liver cells

Cell Membrane Structure and Transport Mechanisms

스터디 가이드 - 연습 문제