$\text{ATP} \rightarrow \text{ADP} + \text{P}_i + \text{energy}$

Question 1

Which of the following best describes primary active membrane transport?

Accepted Answer

It moves molecules against their concentration gradient using energy from ATP hydrolysis.

Question 2

Which ATPase type is responsible for pumping Na$^+$ and K$^+$ ions across the plasma membrane?

Accepted Answer

P-type ATPase

Question 3

A cell is unable to produce ATP. Which transport process would be most directly affected?

Accepted Answer

Primary active transport

Question 4

Which of the following statements correctly distinguishes between active transport and facilitated transport?

Accepted Answer

Active transport uses ATP to power transport, but facilitated transport does not.

Question 5

Which equation best represents the energy requirement for primary active transport?

Accepted Answer

$	ext{ATP} ightarrow 	ext{ADP} + 	ext{P}_i + 	ext{energy}$

Question 6

Which ATPase type is primarily involved in acidifying intracellular vesicles?

Accepted Answer

V-type ATPase

Question 7

What is the main function of ABC-type ATPases?

Accepted Answer

Transporting many types of solutes, including drugs, using ATP binding cassettes

Question 8

Which of the following is a key difference between primary and secondary active transport?

Accepted Answer

Primary active transport directly uses ATP hydrolysis, while secondary active transport uses an electrochemical gradient.

Question 9

A mutation disables the Na$^+$/K$^+$ ATPase in a neuron. What is the most likely consequence?

Accepted Answer

The neuron will be unable to maintain its resting membrane potential.

Question 10

Which process is directly powered by ATP hydrolysis?

Accepted Answer

Primary active transport

Question 11

Which of the following best explains why facilitated transport does not require ATP?

Accepted Answer

It moves molecules down their concentration gradient.

Question 12

Which ATPase type is involved in ATP synthesis in mitochondria?

Accepted Answer

F-type ATPase

Question 13

A patient is given a drug that inhibits ABC-type ATPases. Which of the following is a likely effect?

Accepted Answer

Reduced ability to transport drugs and toxins out of cells

Question 14

Which of the following is NOT a function of P-type ATPases?

Accepted Answer

Transporting protons to acidify vesicles

Question 15

Which of the following best describes the role of ATP in primary active transport?

Accepted Answer

ATP hydrolysis provides the energy to move molecules against their concentration gradient.

Question 16

Which of the following is a common misconception about secondary active transport?

Accepted Answer

It directly uses ATP hydrolysis to move molecules.

Primary Active Membrane Transport and ATPases

Study Guide - Practice Questions