Aerobic Respiration Diagram with vs. Photosynthesis

What is the main purpose of aerobic cellular respiration?

• To produce CO₂.

• To store long-term chemical energy.

• To break down food molecules into smaller energy storage molecules.

• To take smaller energy molecules and build them up to food molecules.

Answer explanation

The main purpose of aerobic cellular respiration is to break down food molecules, such as glucose, into smaller energy storage molecules like ATP, which cells use for energy.

What is the correct equation for cellular respiration?

• 6O₂ + C₆H₁₂O₆ -> 6CO₂ + 6H₂O + Energy

• 6O₂ + C₆H₁₂O₆ + Energy -> 6CO₂ + 6H₂O

• 6CO₂ + 6H₂O -> 6O₂ + C₆H₁₂O₆ + Energy

• 6CO₂ + 6H₂O + Energy -> 6O₂ + C₆H₁₂O₆

Answer explanation

The correct equation for cellular respiration shows glucose (C6H12O6) and oxygen (O2) being converted into carbon dioxide (CO2), water (H2O), and energy. The correct choice is 6O2 + C6H12O6 -> 6CO2 + 6H2O + Energy.

What is modeled by letter A?

• Glucose

• Pyruvic Acids (Pyruvates)

• ATP

• Carbon Dioxide (CO₂)

Answer explanation

Letter A represents Glucose, which is a key energy source in cellular respiration. It is the starting molecule that gets broken down to produce ATP, while pyruvic acids and carbon dioxide are products of glucose metabolism.

What is modeled by letter B?

• Glucose

• Pyruvic Acids (Pyruvates)

• 2 ATP

• Carbon Dioxide (CO₂)

Answer explanation

Letter B represents Pyruvic Acids (Pyruvates), which are produced during glycolysis when glucose is broken down. This is a key step in cellular respiration, leading to further energy production.

What is modeled by letter C?

• NADPH

• Pyruvic Acids (Pyruvates)

• 2 ATP

• Carbon Dioxide (CO₂)

Answer explanation

Letter C represents 2 ATP, which are produced during glycolysis. This is a key energy currency in cellular processes, distinguishing it from NADPH, pyruvic acids, and carbon dioxide.

What is modeled by letter D?

• NADPH (Loaded electron carrier.)

• Pyruvic Acids (Pyruvates)

• 2 ATP

• Carbon Dioxide (CO₂)

Answer explanation

Letter D represents NADPH, which is a loaded electron carrier crucial for various biochemical reactions, particularly in photosynthesis and cellular respiration, where it helps in transferring electrons.

What is modeled by letter E?

• NADPH (Loaded electron carrier.)

• Pyruvic Acids (Pyruvates)

• 2 ATP

• Carbon Dioxide (CO₂)

Answer explanation

Letter E represents Carbon Dioxide (CO2), which is a key product of cellular respiration and a reactant in photosynthesis, distinguishing it from the other options like NADPH, pyruvates, and ATP.

What process produces E, F, and I?

• Glycolysis

• Krebs Cycle

• Electron Transport

Answer explanation

The Krebs Cycle, also known as the citric acid cycle, produces E, F, and I as it processes acetyl-CoA, generating energy carriers like NADH and FADH2, which are crucial for cellular respiration.

What is the most important product of the Krebs Cycle?

• E

• F

• I

Answer explanation

The most important product of the Krebs Cycle is I, which refers to ATP. ATP is crucial as it provides energy for various cellular processes, making it the key output of this metabolic pathway.

What is modeled by letter I?

• 2 ATP

• CO2

• NADPH & FADH (loaded electron carriers)

Answer explanation

Letter I represents NADPH & FADH, which are loaded electron carriers crucial for energy transfer in cellular processes, particularly in photosynthesis and cellular respiration.