Question

question 7
which of the following is a key characteristic of active transport?
requires energy
moves molecules down the concentration gradient
does not require energy
transports small, uncharged molecules
question 8
2 pts
the sodium - potassium pump is an example of active transport because it:
requires atp to move ions against the concentration gradient
uses a protein channel,
moves molecules from high to low concentration
works only in plants

Explanation:

Active transport is a process that moves molecules against their concentration gradient. This requires energy, typically in the form of ATP. The sodium - potassium pump is a well - known example of active transport. It uses ATP to move sodium ions out of the cell and potassium ions into the cell, both against their concentration gradients. Passive transport, on the other hand, moves molecules down their concentration gradient and does not require energy. Small, uncharged molecules can be transported by passive diffusion. Protein channels can be used in facilitated diffusion (a type of passive transport). The sodium - potassium pump does not work only in plants and is not just about using a protein channel in the sense of passive transport.

Answer:

For Question 7: requires energy
For Question 8: requires ATP to move ions against the concentration gradient