Cellular Respiration - Glycolysis & Krebs

What is the primary role of catabolic pathways in cellular respiration?

• To build complex molecules from simpler ones

• To release stored energy by breaking down complex molecules

• To store energy in the form of ATP

• To transport electrons directly to oxygen

Which of the following processes occurs without the presence of oxygen?

• Aerobic respiration

• Anaerobic respiration

• Fermentation

• Oxidative phosphorylation

What is the role of NAD+ in cellular respiration?

• It acts as a reducing agent

• It functions as an oxidizing agent

• It directly synthesizes ATP

• It is a final electron acceptor

Which stage of cellular respiration produces the most ATP?

• Glycolysis

• Citric acid cycle

• Oxidative phosphorylation

• Fermentation

What is the main purpose of glycolysis?

• To convert pyruvate into acetyl CoA

• To split glucose into two molecules of pyruvate

• To generate oxygen

• To produce water

Which molecule is the final electron acceptor in the electron transport chain?

• NADH

• FADH2

• O2

• CO2

What is the net gain of ATP molecules from glycolysis per molecule of glucose?

• 1

• 2

• 4

• 6

Which of the following is NOT a product of the citric acid cycle?

• ATP

• NADH

• FADH2

• Glucose

What is the role of the electron transport chain in cellular respiration?

• To directly produce ATP

• To produce an electrochemical gradient

• To break down glucose into pyruvate

• To convert pyruvate into acetyl CoA