Which one of the following is active transport ?
[amp_mcq option1=”It is the movement of a substance against a diffusion gradient with the use of energy from respiration.” option2=”It is the movement of a substance against a diffusion gradient without the use of energy.” option3=”It is the movement of a substance against a diffusion gradient with the use of energy from photosynthesis.” option4=”It is the movement of a substance along a diffusion gradient with the use of energy from respiration.” correct=”option1″]
This question was previously asked in
UPSC CDS-2 – 2019