Question

Summarize the steps in aerobic respiration, listing products and reactants for each stage and telling where in the cell each stage occurs.

A) Glycolysis in the cytoplasm, Krebs cycle in the mitochondria, Electron transport chain in the mitochondria. Products: ATP, NADH, FADH2, CO2, H2O.
B) Glycolysis in the mitochondria, Krebs cycle in the cytoplasm, Electron transport chain in the cell membrane. Products: Glucose, O2, CO2, H2O.
C) Glycolysis in the mitochondria, Krebs cycle in the cytoplasm, Electron transport chain in the mitochondria. Products: ATP, NADH, FADH2, CO2, H2O.
D) Glycolysis in the cytoplasm, Krebs cycle in the nucleus, Electron transport chain in the mitochondria. Products: Glucose, O2, NADH, FADH2.

Answer 1

Cellular respiration consists of three stages: glycolysis, Krebs cycle, and electron transport chain. Glycolysis occurs in the cytoplasm, generating ATP, NADH, and pyruvate. The Krebs cycle takes place in the mitochondria, producing ATP, NADH, FADH2, and carbon dioxide. Finally, the electron transport chain occurs in the inner membrane of the mitochondrion, generating ATP as the electrons lose energy.

Step-by-step explanation:

Cellular Respiration Stages

1. Glycolysis: Glucose is broken down in the cytoplasm, producing ATP, NADH, and pyruvate.
2. Krebs Cycle: Pyruvate enters the mitochondria and is fully oxidized into carbon dioxide, generating ATP, NADH, and FADH2.
3. Electron Transport Chain: Electrons extracted from food move down the chain, located in the inner membrane of the mitochondrion, losing energy and producing ATP.