Which of the following yields the least ATP directly?

Which of the following yields the least ATP directly?
A . TCA cycle
B . oxidative phosphorylation
C . glycolysis
D . Beta Oxidation

View Answer

Answer: A

Explanation:

The TCA cycle yields 2 GTPs (molecules that can be converted to ATP but are not ATP themselves), oxidative phosphorylation, which includes the ETC, can yield from 32 to 34 ATP. Glycolysis yields 2 ATP. Beta oxidation yields a range over 100 ATP that depends on the length of the fatty acid being degraded.