Exploring Cellular Respiration and ATP Production

What molecule is often referred to as the 'currency' of biological energy?

• Oxygen

• Glucose

• ATP

• CO2

What process converts glucose and oxygen into CO2, water, and energy?

• Photosynthesis

• Fermentation

• Cellular respiration

• Osmosis

How many ATPs can one molecule of glucose yield in a very efficient cell during cellular respiration?

• About 18 ATP

• About 29-30 ATP

• About 34 ATP

• Up to 38 ATP

What is the net gain of ATP from glycolysis?

• 2 ATP

• 4 ATP

• 34 ATP

• 38 ATP

In the absence of oxygen, what process do muscle cells undergo?

• Krebs Cycle

• Fermentation

• Photosynthesis

• Electron Transport Chain

What happens to the pyruvates in the absence of oxygen?

• They undergo fermentation

• They enter the Krebs Cycle

• They form glucose

• They are excreted as waste

Where does the Krebs Cycle occur within the cell?

• Cytoplasm

• Mitochondrial inner membrane

• Nucleus

• Cell membrane

What is the main purpose of the Krebs Cycle?

• To produce glucose

• To consume oxygen

• To generate ATP directly

• To prepare compounds that will supply energy to the Electron Transport Chain

What is the role of NADH and FADH2 in cellular respiration?

• They store energy that is used in the Electron Transport Chain

• They directly create ATP

• They transport oxygen into the cell

• They break down glucose into pyruvates

What is the final electron acceptor in the Electron Transport Chain?

• ATP

• Oxygen

• Carbon dioxide

• Glucose