The only energy-requiring step in fatty acid oxidation is catalyzed by ______ enzyme?: (A) Thiokinase, (B) Acyl co A dehydrogenase, (C) Thiolase, (D) Beta hydroxy Acyl co A dehydrogenase
Answer is A. In the presence of ATP and coenzyme A, the enzyme acyl-CoA synthetase (thiokinase) catalyzes the conversion of a fatty acid to acyl-CoA. Reference: Harper's Illustrated Biochemistry 30th Edition Pg 224