Question

multiple select question

select all that apply

aerobic respiration utilizes what two molecules as fuel to generate atp?

creatine phosphate
glucose
lactic acid
fatty acids

Explanation:

Identify the metabolic pathways of the options

Using the Aerobic Respiration Yield knowledge point, we evaluate the metabolic roles of each provided molecule:

• Creatine phosphate: Used in the anaerobic phosphagen system for rapid, short-term ATP generation without oxygen.
• Glucose: The primary carbohydrate substrate oxidized during glycolysis and subsequent aerobic pathways (citric acid cycle and electron transport chain) to yield ATP.
• Lactic acid: A byproduct of anaerobic fermentation (glycolysis under anaerobic conditions), not a primary fuel utilized to initiate aerobic respiration.
• Fatty acids: Major lipid substrates oxidized via beta-oxidation to enter the citric acid cycle for aerobic ATP production, especially during prolonged, low-to-moderate intensity exercise.

Select the two primary aerobic fuels

The question asks for the two molecules utilized as fuel specifically by aerobic respiration to generate ATP. Based on metabolic pathways, these are glucose and fatty acids.

Answer:

• Creatine phosphate
• Glucose (Correct answer)
• Lactic acid
• Fatty acids (Correct answer)