Question

graphical representation of cellular respiration
glucose
pyruvate
preparatory
reaction
nadh
nadh
cellular respiration
nadh
nadh
and
fadh2
krebs
cycle
occurs in the
directions: complete the table below for the three stages of aerobic cellular respiration.
stage
where it
occurs
starting
molecules
(reactants)
major products
net atp
produced
oxygen
required?
(yes/no)
glycolysis
krebs cycle
electron
transport
chain

Explanation:

Step1: Analyze Glycolysis

Glycolysis occurs in the cytoplasm. The starting molecule is glucose. Major products are pyruvate, NADH, and ATP. Net ATP produced is 2. Oxygen is not required (No).

Step2: Analyze Krebs Cycle

Krebs cycle occurs in the mitochondrial matrix. Starting molecules are acetyl - CoA (derived from pyruvate). Major products are NADH, FADH₂, ATP, and CO₂. Net ATP produced is 2. Oxygen is not directly used in the cycle but the process is aerobic, so for the cycle itself, oxygen is not required at this stage (No, but the overall process is aerobic).

Step3: Analyze Electron Transport Chain

Electron Transport Chain occurs in the inner mitochondrial membrane. Starting molecules are NADH, FADH₂, and O₂. Major products are ATP and H₂O. Net ATP produced is around 32 - 34. Oxygen is required (Yes).

Answer:

Stage	Where it occurs	Starting molecules (reactants)	Major Products	Net ATP Produced	Oxygen Required? (Yes/No)
Krebs cycle	Mitochondrial matrix	Acetyl - CoA	NADH, FADH₂, ATP, CO₂	2	No
Electron Transport chain	Inner mitochondrial membrane	NADH, FADH₂, O₂	ATP, H₂O	32 - 34	Yes