Question 1

Which of the following statements best describes the role of integral membrane proteins in the plasma membrane?

Accepted Answer

They are the 'mosaic' part of the membrane and can function as transporters.

Question 2

Which of the following molecules is NOT classified as a lipid found in the plasma membrane?

Accepted Answer

Integral membrane protein

Question 3

A scientist uses FRAP (Fluorescence Recovery After Photobleaching) to study membrane dynamics. Which component of the plasma membrane is most likely being analyzed for lateral movement?

Accepted Answer

Integral membrane proteins

Question 4

Which of the following statements about lipids in the plasma membrane is TRUE?

Accepted Answer

Lipids can include glycolipids, sterols, and phospholipids.

Question 5

Which of the following is a function that integral membrane proteins can perform in the plasma membrane?

Accepted Answer

Acting as uniporters or symporters for transport

Question 6

Which of the following statements about membrane fluidity is correct?

Accepted Answer

The characteristics of lipids, such as saturation and sterol content, can change membrane fluidity.

Question 7

A mutation causes a loss of flippase activity in a cell. Which process would be most directly affected?

Accepted Answer

Flip-flop movement of lipids between membrane leaflets

Question 8

Which of the following molecules can have carbohydrate chains covalently linked to them in the plasma membrane?

Accepted Answer

Integral membrane proteins

Question 9

Which of the following is TRUE regarding the transport of oxygen molecules across the plasma membrane?

Accepted Answer

Oxygen molecules diffuse directly through the lipid bilayer.

Question 10

Which of the following statements about the asymmetry of the plasma membrane is correct?

Accepted Answer

Lipids can be distributed asymmetrically between the exoplasmic and cytosolic faces.

Question 11

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

Accepted Answer

Forming the bilayer structure

Question 12

A cell is exposed to SDS-PAGE analysis. Which component of the plasma membrane is most likely to be isolated using this technique?

Accepted Answer

Integral membrane proteins

Question 13

Which of the following statements about the movement of water molecules across the plasma membrane is correct?

Accepted Answer

Water molecules rely on integral membrane proteins for transport.

Question 14

Which of the following is a characteristic shared by both lipids and integral membrane proteins in the plasma membrane?

Accepted Answer

Both can have hydrophobic segments.

Question 15

Which of the following is a plausible consequence of increasing cholesterol content in the plasma membrane?

Accepted Answer

Membrane fluidity decreases at high temperatures.

Question 16

Which of the following statements about the plant cell wall is correct?

Accepted Answer

Neither lipids nor integral membrane proteins are major components of the plant cell wall.

Question 17

Which of the following is TRUE regarding the transport of chloride and bicarbonate ions across the plasma membrane?

Accepted Answer

They rely on integral membrane proteins for transport.

Question 18

Which of the following is a real-world application of membrane asymmetry in medical diagnostics?

Accepted Answer

Detection of specific glycolipids on the exoplasmic face can indicate certain blood types.

Question 19

Which of the following best explains why membrane proteins can be involved in both passive and active transport?

Accepted Answer

They can form channels for passive transport and pumps for active transport.

Question 20

A patient has a genetic mutation affecting the structure of their integral membrane proteins. Which of the following is a likely consequence?

Accepted Answer

Impaired transport of ions and molecules across the plasma membrane.

Membrane Structure and Function: Matching Terms to Statements

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