Cellular Respiration Concepts

The video explains how food is converted into energy through digestion and cellular respiration. It covers the four stages of cellular respiration: glycolysis, pyruvate oxidation, the citric acid cycle, and the electron transport chain. Each stage's role in breaking down glucose and producing ATP is detailed, highlighting the importance of oxygen and the release of carbon dioxide as a byproduct.

What is the primary purpose of digestion in cellular respiration?

• To eliminate waste from the body

• To convert food into chemical compounds for energy

• To store food for later use

• To increase the size of cells

During glycolysis, what is the net gain of ATP molecules?

• Two ATP molecules

• No ATP molecules

• Four ATP molecules

• Six ATP molecules

What is the end product of glycolysis?

• Carbon Dioxide

• Acetyl CoA

• Pyruvate

• Glucose

What happens to pyruvate in the mitochondria?

• It is converted into glucose

• It is oxidized to form acetyl CoA

• It is stored as fat

• It is used to build proteins

Which cycle is responsible for producing NADH and FADH2?

• Photosynthesis

• Electron Transport Chain

• Citric Acid Cycle

• Glycolysis

What is the role of oxygen in the electron transport chain?

• To act as a catalyst

• To transport electrons

• To provide energy for ATP synthesis

• To serve as the final electron acceptor

How is ATP synthesized in the electron transport chain?

• Through the breakdown of glucose

• Through the oxidation of NADH

• By the conversion of pyruvate

• By the flow of hydrogen ions through ATP synthase

What is the total number of ATP molecules produced per glucose molecule during cellular respiration?

• 24 ATP molecules

• 18 ATP molecules

• 42 ATP molecules

• 36 ATP molecules

What is released as a by-product of cellular respiration?

• Nitrogen

• Hydrogen

• Carbon Dioxide

• Oxygen

What is the main goal of cellular respiration?

• To create proteins

• To store fat

• To produce glucose

• To generate ATP