Answer:
i'm not sure if these are all the options you have but the answer is that active transport requires energy and that active transport is the movement of molecules from an area of their lower to their higher concentration against the concentration gradient
Explanation:
C. Carbohydrate, contains a nitrogen bonded to carbon and is usually basic.
Copper key and glass lens
It has an alternating chemical phosphate and sugar backbone, making the ‘sides’ of the ladder.