Question

____is a cell's main source of energy.

fat
glucose
protein

Answer 1

@EclipsedStar please help

Answer 2

Depends on what are you asking,
if you asked about substance that provides most energy the answer is glucose, amino acids, fatty acids, and electron acceptor. These ingredients is then synthesized to become ATP, which is a primary source of energy. The chemical reaction is processed in cell's respiratory organ called the Mitochondria.

Answer 3

Well I gave you too much info...

Answer 4

xD

Answer 5

No multiple answers allowed?

Answer 6

one only