Q: Which equation describes the net movement of water during osmosis?

$$\text{Net movement} = \text{from low solute concentration to high solute concentration}$$

Question 1

Which of the following best describes the structure of the biological membrane?

Accepted Answer

A bilayer of phospholipids with embedded proteins

Question 2

In animal cells, which protein provides tissue strength and structural integrity, and what structure performs a similar function in plant cells?

Accepted Answer

Collagen; cell wall

Question 3

In active transport, molecules move against a concentration gradient. In passive transport, molecules move along the concentration gradient. Which equation best represents the change in free energy ($$\Delta G) $$for passive transport?

Accepted Answer

$$\Delta G \u003c 0$$

Question 4

How does a large difference in concentration gradient affect the rate of diffusion across a membrane?

Accepted Answer

It increases the rate of diffusion

Question 5

Which of the following molecules faces the greatest difficulty crossing the plasma membrane?

Accepted Answer

Sodium ion ($$\mathrm{Na^+})$$

Question 6

Which of the following is a characteristic of passive transport but not active transport?

Accepted Answer

Kinetic energy dependence

Question 7

For osmosis to occur, the cell membrane must be:

Accepted Answer

Semipermeable

Question 8

A cell placed in a hypertonic solution will:

Accepted Answer

Lose water to the outside via osmosis

Question 9

Simple diffusion, in contrast to facilitated diffusion:

Accepted Answer

Moves small, non-polar molecules

Question 10

Which type of particle movement is illustrated when glucose moves through a carrier protein in the plasma membrane?

Accepted Answer

Facilitated diffusion

Question 11

The sodium concentration is _____ inside the cell than outside, and the potassium concentration is _____ inside the cell. To maintain these concentrations, _____ is needed to power the sodium-potassium pump during active transport.

Accepted Answer

Lower; greater; ATP

Question 12

A cell moves ions from a region of low concentration to a region of high concentration. This process is known as:

Accepted Answer

Active transport

Question 13

The engulfment of a dead cell by another cell is an example of which type of endocytosis?

Accepted Answer

Phagocytosis

Question 14

Which of the following best explains why ions such as $$\mathrm{Na^+}$$ and $$\mathrm{K^+}$$ require transport proteins to cross the plasma membrane?

Accepted Answer

They are charged and cannot pass through the hydrophobic lipid bilayer

Question 15

Which of the following scenarios would result in a cell swelling due to water intake?

Accepted Answer

Placing the cell in a hypotonic solution

Question 16

Which equation describes the net movement of water during osmosis?

Accepted Answer

$$	ext{Net movement} = 	ext{from low solute concentration to high solute concentration}$$

Question 17

Which of the following is true about facilitated diffusion?

Accepted Answer

It requires membrane proteins but does not require energy

Question 18

A red blood cell placed in a solution with $$0.9\%$$ NaCl will:

Accepted Answer

Remain unchanged because the solution is isotonic

Question 19

Which process is responsible for the uptake of large particles, such as bacteria, by immune cells?

Accepted Answer

Phagocytosis

Question 20

Which of the following statements about active transport is correct?

Accepted Answer

It moves substances against their concentration gradient using energy from ATP

Cell Membrane Structure and Transport Mechanisms

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