Question

The sodium-potassium pump within living cells requires energy to move ions across the cell membrane
to maintain homeostasis. How is this energy supplied?

A When adenine is removed from adenosine triphosphate (ATP), a large amount of energy is
produced.
B When two adenosine triphosphate (ATP) molecules are fused together, a large amount of energy
is produced.
C When a phosphate group is removed from adenosine triphosphate (ATP), a large amount of energy
is produced.
D When the sugar and phosphate groups of adenosine triphosphate (ATP) are fused together, a
large amount of energy is produced.

Answer 1

D When the sugar and phosphate groups of adenosine triphosphate (ATP) are fused together, a
large amount of energy is produced.

Answer 2

C) When a phosphate group is removed from adenosine triphosphate (ATP), a large amount of energy is produced.

ATP (3 phosphates) --> releases energy when a phosphate is removed to make ADP
[see attached image]