Q: Which equation best represents the hydrolysis of ATP during active transport?

$$ATP \rightarrow ADP + Pi + \text{energy}$$

Question 1

Which of the following best describes the Fluid Mosaic Model of the cell membrane?

Accepted Answer

A dynamic structure consisting of lipids, proteins, and carbohydrates that move laterally within the bilayer.

Question 2

What is the primary function of cholesterol in the cell membrane?

Accepted Answer

To maintain membrane fluidity at various body temperatures.

Question 3

Which equation best represents the hydrolysis of ATP during active transport?

Accepted Answer

$$ATP ightarrow ADP + Pi + 	ext{energy}$$

Question 4

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 5

Which type of membrane protein is primarily responsible for moving large hydrophilic molecules across the membrane?

Accepted Answer

Transport proteins

Question 6

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

Accepted Answer

Active transport

Question 7

What is the main function of polysaccharides attached to glycoproteins and glycolipids in animal cell membranes?

Accepted Answer

Cell-cell recognition and identification

Question 8

Which of the following molecules can pass freely through the lipid bilayer of the cell membrane?

Accepted Answer

Hydrophobic molecules like $$O_2$$ and $$CO_2$$

Question 9

Which membrane transport process is illustrated by the movement of water from an area of low solute concentration to high solute concentration?

Accepted Answer

Osmosis

Question 10

A cell uses a proton pump to create an electrochemical gradient. What is the main purpose of this gradient?

Accepted Answer

To store energy for cotransport of other molecules

Question 11

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

Accepted Answer

DNA replication

Question 12

Which equation best describes the movement of solute during simple diffusion?

Accepted Answer

$$J = -D \frac{dC}{dx}$$

Question 13

Which type of bulk transport involves the cell engulfing large particles by wrapping pseudopodia around them?

Accepted Answer

Phagocytosis

Question 14

What is the main difference between facilitated diffusion and active transport?

Accepted Answer

Active transport requires energy and moves substances against their concentration gradient, while facilitated diffusion does not require energy and moves substances with their concentration gradient.

Question 15

Which of the following best describes receptor-mediated endocytosis?

Accepted Answer

A specialized type of pinocytosis that allows the cell to acquire bulk quantities of specific substances using receptors.

Question 16

Which of the following statements about membrane sidedness is correct?

Accepted Answer

Membranes have distinct inside and outside faces with different compositions.

Question 17

Which of the following is a real-life example of cotransport in cells?

Accepted Answer

The uptake of glucose in the intestine coupled with sodium ion transport.

Question 18

Which of the following statements is correct about diffusion?

Accepted Answer

It moves molecules from areas of high concentration to low concentration.

Question 19

Which of the following is NOT a component of the cell membrane according to the Fluid Mosaic Model?

Accepted Answer

Cellulose

Question 20

Which type of transport is used by cells to secrete hormones into the bloodstream?

Accepted Answer

Exocytosis

Membrane Transport and Cell Signaling: Structure and Function of the Cell Membrane

Guida di studio - Domande di pratica

Study guide - Flashcard