Question

1. where does the matter used to produce atp in the electron transport chain come from? products of glycolysis products of the krebs cycle products of photosynthesis products of cellular respiration

Explanation:

The electron - transport chain is part of cellular respiration. Glycolysis and the Krebs cycle are earlier stages of cellular respiration, and their products (such as NADH and FADH₂) are used in the electron - transport chain to produce ATP. Photosynthesis is a separate process from cellular respiration's electron - transport chain. The most accurate answer is that the matter comes from the products of cellular respiration as it encompasses the products of glycolysis and the Krebs cycle which are utilized in the electron - transport chain for ATP production.

Answer:

products of cellular respiration