Breath and Energy The Essentials of Cellular Respiration

The video explores the critical role of oxygen in human survival and delves into the process of cellular respiration. It covers the stages of glycolysis, the Krebs cycle, and the electron transport chain, explaining how glucose and oxygen are used to produce ATP, carbon dioxide, and water. The video highlights the importance of ATP as an energy currency and describes the differences between aerobic and anaerobic respiration. It also explains the role of NADH and FADH2 as electron carriers and the significance of oxygen as the final electron acceptor in the electron transport chain.

What is the maximum time a human can survive without oxygen before brain damage or death is likely?

• 30 minutes

• 10 minutes

• 3 to 4 minutes

• 1 minute

Which type of respiration provides the most energy per glucose molecule?

• Fermentation

• Photosynthesis

• Aerobic respiration

• Anaerobic respiration

What is the net gain of ATP molecules during glycolysis?

• 6 ATP

• 2 ATP

• 4 ATP

• 1 ATP

Which molecule is a mobile electron carrier in cellular respiration?

• NADH

• ATP

• Oxygen

• Glucose

What is the main purpose of the Krebs cycle?

• To produce glucose

• To generate oxygen

• To recharge ATP and electron carriers

• To break down water

How many times does the Krebs cycle turn per glucose molecule?

• Once

• Twice

• Four times

• Three times

What is the final electron acceptor in the electron transport chain?

• Carbon dioxide

• NADH

• Water

• Oxygen

What process uses the proton gradient to generate ATP?

• Krebs cycle

• Glycolysis

• Photosynthesis

• Chemiosmosis

How many ATP molecules can be produced from one glucose molecule in an efficient cell during cellular respiration?

• 34 ATP

• 10 ATP

• 38 ATP

• 18 ATP

What is the role of ATP synthase in cellular respiration?

• To break down glucose

• To release carbon dioxide

• To transport electrons

• To synthesize ATP from ADP