Understanding Photosynthesis

What are the main stages of the Calvin cycle?

• Glycolysis, Krebs cycle, oxidative phosphorylation

• Light reaction, dark reaction, electron transport

• Carbon fixation, reduction, regeneration of RuBP

• Photosynthesis, respiration, fermentation

How does chlorophyll contribute to photosynthesis?

• Chlorophyll is responsible for the absorption of nutrients from the soil.

• Chlorophyll acts as a catalyst in the breakdown of glucose during respiration.

• Chlorophyll releases energy that directly converts glucose into oxygen.

• Chlorophyll absorbs light energy, enabling the conversion of carbon dioxide and water into glucose and oxygen.

List three factors that can affect the rate of photosynthesis.

• Soil quality

• Water availability

• Air pressure

• Light intensity, carbon dioxide concentration, temperature

Write the overall equation for photosynthesis.

• 6CO2 + 6H2O -> C6H12O6 + 6O2 + light energy

• 6CO2 + 6H2O + light energy -> C6H12O6 + 6O2

• 6O2 + C6H12O6 + light energy -> 6CO2 + 6H2O

• C6H12O6 + 6O2 + light energy -> 6CO2 + 6H2O

What role do stomata play in the process of photosynthesis?

• Stomata store water for plant growth.

• Stomata absorb sunlight for photosynthesis.

• Stomata allow for the exchange of gases, enabling the intake of carbon dioxide and the release of oxygen during photosynthesis.

• Stomata produce chlorophyll for photosynthesis.

Explain the significance of ATP and NADPH in the Calvin cycle.

• ATP is only used for protein synthesis.

• NADPH is a waste product of the Calvin cycle.

• ATP and NADPH are crucial for energy and reducing power in the Calvin cycle.

• ATP and NADPH are not involved in photosynthesis.

What is the primary pigment involved in photosynthesis?

• Carotene

• Chlorophyll

• Xanthophyll

• Phycobilin

How does light intensity affect the rate of photosynthesis?

• Photosynthesis occurs only in darkness regardless of light intensity.

• Increased light intensity generally increases the rate of photosynthesis up to a saturation point.

• Higher light intensity decreases the rate of photosynthesis.

• Light intensity has no effect on photosynthesis.

Describe how temperature influences photosynthesis.

• Temperature influences photosynthesis by affecting enzyme activity and metabolic processes, increasing rates up to an optimal point before causing declines at extreme temperatures.

• Higher temperatures always enhance photosynthesis without limits.

• Photosynthesis only occurs at freezing temperatures.

• Temperature has no effect on photosynthesis.

What is the function of RuBisCO in the Calvin cycle?

• RuBisCO acts as a catalyst for the breakdown of carbohydrates in the Calvin cycle.

• RuBisCO transports oxygen to the chloroplasts during photosynthesis.

• RuBisCO facilitates the fixation of carbon dioxide in the Calvin cycle.

• RuBisCO is responsible for the production of glucose in the Calvin cycle.