L6 Cell Anatomy: Membrane bound organelles

Question 1 of 8

1

Which is NOT a function of membranes?

Select one of the following:

Separation of incompatible processes
Creation of concentration gradients
Packaging for transport
Digestion of debris

Explanation

Question 2 of 8

1

Which statements about the plasma membrane are CORRECT?

Select one or more of the following:

It is a fluid phospholipid bilayer with proteins and other lipids incorporated into it.
It is permeable to hydrophobic molecules like steroid hormones.
It restricts entry of hydrophilic and ionic (charged) molecules/
It is always saturated.

Explanation

Question 3 of 8

1

Cholesterol acts as a fluidity buffer for the plasma membrane as it makes the phospholipid layer more viscous, but also lowers its solidifying point,

Select one of the following:

True
False

Explanation

Question 4 of 8

1

Proteins are unspecific to cell type.

Select one of the following:

True
False

Explanation

Question 5 of 8

1

There are two types of transport in regards to energy transfer: passive and active. Passive is from ❌ concentration, "❌" a gradient. Active is from ❌ concentration, "❌" a gradient.

Drag and drop to complete the text.

high to low

down

low to high

up

Explanation

Question 6 of 8

1

Facilitated diffusion is a form of ❌ transport where molecules are too large to diffuse through a membrane on their own. Facilitated diffusion involves ❌.
Channels can be "leak" channels where molecules can ❌ move, or they can be gated. Voltage-gated channels respond to changes in ❌ whereas ligand-gated channels respond to ❌.

Drag and drop to complete the text.

passive

channels or carrier proteins

freely

charge

chemical signals

Explanation

Question 7 of 8

1

Active transport utilises ❌ that act as pumps which use ❌ to move molecules ❌ a concentration gradient. This is important for maintaining ❌ of ions, and can be direct or indirect. A classic example is the ❌ pump.

Drag and drop to complete the text.

ATP

up

concentration

sodium-potassium

proteins

Explanation

Question 8 of 8

1

Which of the following is not a function of proteins?

Select one or more of the following:

Signal transduction
Cell recognition
Linking of membranes to the cytoskeleton or ECM
Linking of cells
Linking of organelles

	Created by Mer Scott over 7 years ago

Objectives: Outline the importance of organelles and sub-cellular compartments • Describe the structure of the plasma membrane and outline its importance to cell function • Outline mechanisms by which substances traverse the plasma membrane

L6 Cell Anatomy: Membrane bound organelles

Question 1 of 8

Which is NOT a function of membranes?

Select one of the following:

Explanation

Question 2 of 8

Which statements about the plasma membrane are CORRECT?

Select one or more of the following:

Explanation

Question 3 of 8

Cholesterol acts as a fluidity buffer for the plasma membrane as it makes the phospholipid layer more viscous, but also lowers its solidifying point,

Select one of the following:

Explanation

Question 4 of 8

Proteins are unspecific to cell type.

Select one of the following:

Explanation

Question 5 of 8

There are two types of transport in regards to energy transfer: passive and active. Passive is from ❌ concentration, "❌" a gradient. Active is from ❌ concentration, "❌" a gradient.

Drag and drop to complete the text.

Explanation

Question 6 of 8

Drag and drop to complete the text.

Explanation

Question 7 of 8

Active transport utilises ❌ that act as pumps which use ❌ to move molecules ❌ a concentration gradient. This is important for maintaining ❌ of ions, and can be direct or indirect. A classic example is the ❌ pump.

Drag and drop to complete the text.

Explanation

Question 8 of 8

Which of the following is not a function of proteins?

Select one or more of the following:

Explanation