Transport Mechanisms in Cell Membranes

Transport Mechanisms in Cell Membranes

Assessment

Interactive Video

Biology, Science

9th - 12th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial covers facilitated diffusion, a type of passive transport that moves materials across cell membranes with the help of proteins. It contrasts passive and active transport, explaining that passive transport does not require energy. The tutorial details different types of diffusion, including simple diffusion, osmosis, and facilitated diffusion, and describes how transport proteins like channel and carrier proteins assist in the process. It also discusses the structure of proteins and their specific roles in diffusion, as well as the movement of water through aquaporins.

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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main difference between passive and active transport?

Passive transport requires energy, while active transport does not.

Active transport requires energy, while passive transport does not.

Both require energy but in different forms.

Neither requires energy.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In which direction do materials move during diffusion?

Only into the cell

In random directions

From low to high concentration

From high to low concentration

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of molecules can pass through the lipid bilayer by simple diffusion?

Large polar molecules

Charged ions

Proteins

Non-polar molecules

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What role do channel proteins play in facilitated diffusion?

They form a pore for specific molecules to pass through.

They change the concentration gradient.

They provide energy for transport.

They act as a barrier to prevent diffusion.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do carrier proteins differ from channel proteins?

Carrier proteins are non-specific.

Carrier proteins only transport water.

Carrier proteins change shape to transport molecules.

Carrier proteins require energy to function.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the significance of the specificity of transport proteins?

They ensure only specific molecules can pass through.

They prevent any molecules from passing through.

They allow any molecule to pass through.

They require energy to function.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of R groups in transport proteins?

They provide energy for transport.

They determine the protein's specificity.

They block the passage of molecules.

They are not involved in transport.

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