21. Which of the following is a biological uncoupler of oxidative phosphorylation? (A) Antimycin A (B) Oligomycin (C) 2, 4-Dichlorophenoxyacetic acid (D) Thermogenin

5. Which one of the following statements is correct? (A) Fatty acid biosynthesis is a mitochondria function. (B) Fatty acid biosynthesis requires FADH2 as a cofactor. (C) Fatty acid biosynthesis requires NADH as a cofactor. (D) Fatty acid biosynthesis requires NADPH as a cofactor.