Question

Which of the following are true about active transport?

a.) energy is required
b.) there is no energy required
c.) moving against proton gradient
d.) moving with proton gradient

Answer 1

Active transport requires energy, typically in the form of ATP, to move substances across cellular membranes against their concentration gradients.

Step-by-step explanation:

Regarding which of the following are true about active transport, the correct statements are that energy is required and it involves moving against the concentration gradient. Active transport is an energy-consuming process that moves substances through cellular membranes against their natural movement direction, i.e., from regions of lower concentration to regions of higher concentration.Within the process of active transport, cells use adenosine triphosphate (ATP) as their main source of energy.

Examples of active transport include the sodium-potassium pump, which moves sodium ions out of cells and potassium ions into cells, even though this movement is against their respective concentration gradients.