Question

multiple select question

select all that apply

the primary catabolism of molecules by most organisms would include which three of the following pathways?

respiratory chain
glycolysis
calvin cycle
krebs cycle
fermentation

Explanation:

Identify catabolic pathways vs. anabolic pathways

The question asks for the three primary pathways involved in the catabolism of molecules by most organisms. Catabolism refers to the breakdown of complex molecules to release energy.

Evaluate each option

• Respiratory chain: Part of aerobic/anaerobic respiration (catabolic).
• Glycolysis: The breakdown of glucose to pyruvate (catabolic).
• Calvin cycle: An anabolic pathway used in photosynthesis to synthesize hexose sugars from carbon dioxide (not catabolic).
• Kreb's cycle: Also known as the citric acid cycle, which oxidizes acetyl-CoA derived from carbohydrates, fats, and proteins (catabolic).
• Fermentation: An anaerobic catabolic pathway, but the standard "three primary pathways" of aerobic respiration (the dominant form of catabolism in most organisms) are glycolysis, the Krebs cycle, and the respiratory chain (electron transport chain).

Select the three primary pathways

The three primary pathways that constitute the complete aerobic catabolism of glucose in most organisms are Glycolysis, Kreb's cycle, and the Respiratory chain.

Answer:

• Respiratory chain (Correct answer)
• Glycolysis (Correct answer)
• Calvin cycle
• Kreb's cycle (Correct answer)
• Fermentation