which molecule helps pyruvate cross the mitochondrial membrane?\natp\nacetyl coa\nfadh2\nnadh

Brief Explanations:

Pyruvate is transported across the mitochondrial membrane by a pyruvate - translocase. Among the given options, none of them directly helps pyruvate cross the membrane. However, pyruvate is converted to acetyl - CoA inside the mitochondria after crossing the membrane. But if we consider the process in a more general sense, pyruvate enters the mitochondria in its unmodified form through a specific transport protein. ATP is an energy - carrier, FADH2 and NADH are electron - carriers and not involved in pyruvate transport across the membrane.

Answer:

None of the above