Question

3.4.2 test (cst): computer-scored unit test glycolysis krebs cycle electron transport chain what is the energy input of the process shown? a. potential energy from chlorophyll b. light energy from the sun c. electrical energy from hydrogen ions d. chemical energy from food molecules

Explanation:

The process shown (glycolysis, Krebs cycle, electron transport chain) is cellular respiration. Cellular respiration uses chemical energy from food molecules (like glucose) as input to produce ATP. Option A and B relate to photosynthesis (using chlorophyll and light energy). Option C is about a part of the electron transport chain's energy use, not the input. So the energy input is chemical energy from food molecules.

Answer:

D. Chemical energy from food molecules