Cellular Respiration Quiz

Overview of Cellular Respiration

• Cellular respiration is the first step in the breakdown of glucose
• The process occurs in the cytoplasm and mitochondria

Glycolysis

• Glycolysis is the first stage of cellular respiration
• It occurs in the cytoplasm
• The net gain of ATP molecules in glycolysis is 2
• Glucose is the starting molecule for glycolysis
• Pyruvate is the final product of glycolysis
• NAD+ gets reduced to NADH during glycolysis
• 2 NADH molecules are produced from one glucose molecule during glycolysis
• CO2 is not produced during glycolysis

Krebs Cycle

• The Krebs cycle takes place in the mitochondrial matrix
• The Krebs cycle produces ATP, NADH, and FADH2
• Acetyl-CoA enters the Krebs cycle
• Oxaloacetate is regenerated at the end of the Krebs cycle
• CO2 is produced during the Krebs cycle

Electron Transport Chain

• The electron transport chain is the main purpose of generating ATP
• Oxygen is the final electron acceptor in the electron transport chain
• The electron transport chain produces the most ATP in cellular respiration
• ATP synthase is the crucial enzyme for ATP synthesis in the electron transport chain
• 3 ATP molecules are generated per NADH during the electron transport chain

General Concepts

• In aerobic respiration, the energy in glucose is captured as ATP
• Fermentation is the pathway taken when oxygen is not present in sufficient amounts for cellular respiration
• Carbon dioxide is released as a waste product during cellular respiration
• The majority of ATP is produced during cellular respiration in the mitochondrial inner membrane
• Oxygen plays a crucial role in cellular respiration as the final electron acceptor