Question

build understanding
compare/contrast table use a compare/contrast table when you want to see the similarities and differences between two or more objects or processes. look at the table below. the three stages of cellular respiration are shown across the top. the topics being compared are listed in the first column.
as you read about the process of cellular respiration, complete the table. the first one has been done for you. use the completed chart as a study aid.
answer the questions.

1. where do the reactants for the krebs cycle come from?
2. what is the name of the protein spheres that spin as hydrogen ions pass through them?

Explanation:

1. For the first question:

• In cellular respiration, after glycolysis (which produces pyruvate), pyruvate is converted into acetyl - CoA. Acetyl - CoA is the starting reactant for the Krebs cycle.

1. For the second question:

• In the electron transport chain, ATP synthase is the protein complex (protein spheres) that uses the energy from the flow of hydrogen ions (protons) to synthesize ATP. As hydrogen ions pass through ATP synthase, it spins and catalyzes the formation of ATP from ADP and inorganic phosphate.

Answer:

1. The reactants for the Krebs cycle (acetyl - CoA) come from the conversion of pyruvate (produced in glycolysis).
2. The name of the protein spheres is ATP synthase.