Which of the following statements about mitochondrial proteins is true?

A.

All mitochondrial proteins are coded for and synthesized in the mitochondria

B.

Some mitochondrial proteins are coded for and synthesized in the mitochondria and others

C.

All mitochondrial proteins are imported from the cytoplasm

D.

Mitochondrial proteins arise from other mitochondrial proteins

Correct answer is B

No explanation has been provided for this answer.