Question

Which of the following are true about simple diffusion?

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

Answer 1

Simple diffusion is a passive transport mechanism that does not require energy and does not involve transport proteins. It does not move against or with a proton gradient.

Step-by-step explanation:

Simple diffusion is a passive transport mechanism that moves a substance from an area of higher concentration to an area of lower concentration, down its concentration gradient. It does not require any energy, making option b.) 'there is no energy required' true. Simple diffusion occurs directly through the plasma membrane and does not require any transport proteins, making option c.) 'require transport proteins' false. As for options d.) 'moving against proton gradient' and e.) 'moving with proton gradient,' these are incorrect because simple diffusion does not involve the movement of substances against or with a proton gradient.