Active and passive transport

Active and passive transport

11th Grade

12 Qs

quiz-placeholder

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Active and passive transport

Active and passive transport

Assessment

Quiz

Biology

11th Grade

Medium

Created by

Edward Howell

Used 5+ times

FREE Resource

12 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Movement across the membrane without the need for energy is called _______ transport.

passive

active

facilitated

bulk

Answer explanation

Movement across the membrane that does not require energy is known as passive transport. This process relies on concentration gradients, allowing substances to move freely without the use of cellular energy.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an isotonic solution, how does water move across the cell membrane?

Water moves into the cell.

Water moves out of the cell.

Water moves equally in both directions.

Water does not move at all.

Answer explanation

In an isotonic solution, the concentration of solutes is equal inside and outside the cell. Therefore, water moves equally in both directions across the cell membrane, maintaining balance.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to a cell in a hypertonic solution?

The cell swells and bursts.

The cell shrinks.

The cell remains the same size.

The cell divides.

Answer explanation

In a hypertonic solution, the concentration of solutes outside the cell is higher than inside. This causes water to move out of the cell, leading to cell shrinkage. Therefore, the correct answer is that the cell shrinks.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The plasma membrane will allow oxygen and carbon dioxide to pass through the membrane while other substances are blocked from passing through the membrane; its unique characteristic is described as _______________________________.

selective permeability

complete impermeability

universal permeability

random permeability

Answer explanation

The plasma membrane's ability to allow certain substances like oxygen and carbon dioxide to pass while blocking others is known as selective permeability. This characteristic is crucial for maintaining cellular homeostasis.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Naturally, molecules move from an area of _______________________________ to _______________________________ without the need of energy.

high concentration to low concentration

low concentration to high concentration

medium concentration to high concentration

low concentration to medium concentration

Answer explanation

Molecules naturally move from an area of high concentration to low concentration due to diffusion, which does not require energy. This process continues until equilibrium is reached.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Diffusion is defined as:

The movement of particles from an area of high concentration to an area of low concentration.

The process of particles settling at the bottom of a container.

The movement of particles in a circular motion.

The process of particles being absorbed by a solid.

Answer explanation

Diffusion is the movement of particles from an area of high concentration to an area of low concentration, which is the correct definition. The other options describe different processes.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What would happen to a cell if placed in each of the following solutions?

a. The cell remains the same size in an isotonic solution.

b. The cell swells and may burst in a hypotonic solution.

c. The cell shrinks in a hypertonic solution.

Answer explanation

In an isotonic solution, the concentration of solutes is equal inside and outside the cell, so water moves in and out at the same rate, keeping the cell size constant. This is why option a is correct.

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