Question

graphical representation of cellular respiration
overview of the stages of cellular respiration

	1	2	3
where it occurs
reactants
products
atp produced

Explanation:

Step1: Identify the first stage of cellular respiration

Glycolysis is the first stage. It occurs in the cytoplasm. Reactants are glucose, 2 ATP, 2 NAD⁺. Products are 2 pyruvate, 4 ATP (net gain 2 ATP), 2 NADH.

Step2: Identify the second stage

The Krebs cycle (citric - acid cycle) is the second stage. It occurs in the mitochondrial matrix. Reactants are pyruvate (after conversion to acetyl - CoA), NAD⁺, FAD, ADP + Pi. Products are CO₂, NADH, FADH₂, ATP.

Step3: Identify the third stage

The electron - transport chain is the third stage. It occurs in the inner mitochondrial membrane. Reactants are NADH, FADH₂, O₂. Products are H₂O, ATP.

Answer:

	1	2	3
Where it occurs	Cytoplasm	Mitochondrial matrix	Inner mitochondrial membrane
Reactants	Glucose, 2 ATP, 2 NAD⁺	Pyruvate (as acetyl - CoA), NAD⁺, FAD, ADP + Pi	NADH, FADH₂, O₂
Products	2 Pyruvate, 4 ATP (net gain 2 ATP), 2 NADH	CO₂, NADH, FADH₂, ATP	H₂O, ATP
ATP Produced	2 (net)	2	26 - 28