Question

The overall goal of glycolysis, Krebs cycle and electron transport system is the formation of

• A. ATP in small stepwise units
• B. Nucleic acids
• C. Sugars
• D. ATP in one large oxidation reaction

Answer 1

The correct option is A

ATP in small stepwise units

Glycolysis, the Krebs cycle and the electron transport system all yield ATP which is the main energy currency of the cell. During oxidation of respiratory substrates within a cell, the energy contained in them is released in a series of slow stepwise reactions controlled by respiratory enzymes.