Photosynthesis and Respiration Concepts

What are the main products of the light-dependent reactions?

• Oxygen, glucose, and ribulose bisphosphate

• Carbon dioxide, NADH, and glucose

• Oxygen, ATP, and NADPH

• Glucose, ATP, and FADH2

Describe the role of chlorophyll in photosynthesis.

• Chlorophyll is a type of carbohydrate used in energy storage.

• Chlorophyll releases oxygen during photosynthesis.

• Chlorophyll reflects all light wavelengths equally.

• Chlorophyll absorbs light energy for photosynthesis.

What is the primary function of the Calvin cycle?

• To store carbon dioxide in the soil.

• To produce oxygen from sunlight.

• To convert carbon dioxide into glucose.

• To break down glucose for energy.

How many ATP molecules are produced during glycolysis?

• 1 ATP

• 4 ATP

• 3 ATP

• 2 ATP

What is the end product of glycolysis?

• Acetyl-CoA

• Lactate

• Glucose

• Pyruvate

Explain the significance of the Krebs cycle in cellular respiration.

• The Krebs cycle directly converts glucose into fatty acids.

• The Krebs cycle is significant in cellular respiration as it generates high-energy electron carriers and ATP, facilitating energy production and metabolic intermediates.

• The Krebs cycle produces oxygen for cellular respiration.

• The Krebs cycle is only important for plant cells.

What are the main inputs of the Krebs cycle?

• Acetyl-CoA, NAD+, FAD, GDP (or ADP)

• Lactate, Acetyl-CoA, GTP, CO2

• Glucose, NADH, FADH2, O2

• Pyruvate, ATP, Citrate, CoA

How does the electron transport chain contribute to ATP production?

• The electron transport chain breaks down glucose into pyruvate.

• The electron transport chain directly produces ATP without a proton gradient.

• The electron transport chain generates a proton gradient that powers ATP synthesis.

• The electron transport chain uses ATP to generate electrons.

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

• NADH and FADH2 are involved in the breakdown of fatty acids.

• NADH and FADH2 serve as electron carriers that transfer high-energy electrons to the electron transport chain, facilitating ATP production.

• NADH and FADH2 are used to synthesize glucose directly.

• NADH and FADH2 are waste products of cellular respiration.

Describe the process of photophosphorylation.

• Photophosphorylation occurs only in animal cells during respiration.

• Photophosphorylation is the process of ATP production using light energy during photosynthesis.

• Photophosphorylation is the breakdown of glucose in the absence of oxygen.

• Photophosphorylation is the process of converting carbon dioxide into glucose without light.