Photosynthesis

Click on the flashcard to see the answer



What is photosynthesis?

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll, producing oxygen as a byproduct.

Where in the plant does photosynthesis typically occur?

Photosynthesis primarily occurs in the leaves of plants, specifically in the chloroplasts.

Which pigment is crucial for the process of photosynthesis?

Chlorophyll is the crucial pigment required for photosynthesis.

What are the main products of photosynthesis?

The main products of photosynthesis are glucose and oxygen.

What are the main reactants needed for photosynthesis to occur?

The main reactants needed for photosynthesis are carbon dioxide and water.

What is the equation for photosynthesis?

6CO2 + 6H2O + light energy → C6H12O6 + 6O2.

Which gas is absorbed during photosynthesis?

Carbon dioxide is absorbed during photosynthesis.

Which gas is released as a byproduct of photosynthesis?

Oxygen is released as a byproduct of photosynthesis.

What role does sunlight play in photosynthesis?

Sunlight provides the energy required to drive the photosynthesis reaction.

What is the role of chlorophyll in photosynthesis?

Chlorophyll absorbs light energy and uses it to convert carbon dioxide and water into glucose.

How does photosynthesis benefit heterotrophs like humans and animals?

Photosynthesis produces oxygen which is essential for respiration in heterotrophs and forms the base of the food chain providing energy-rich compounds like glucose.

What is the importance of water in the process of photosynthesis?

Water provides electrons and hydrogen ions in the light-dependent reactions, and oxygen is released as a byproduct.

What effect does light intensity have on the rate of photosynthesis?

The rate of photosynthesis generally increases with an increase in light intensity, up to a certain point.

What is the light-dependent reaction in photosynthesis?

The light-dependent reaction utilizes sunlight to split water, releasing oxygen, generating ATP, and reducing NADP+ to NADPH.

What happens during the Calvin Cycle?

During the Calvin Cycle, ATP and NADPH produced in the light-dependent reactions are used to produce glucose from carbon dioxide.





Test Your Knowledge

Select the correct option


1. What is photosynthesis?

Photosynthesis is the process by which plants release carbon dioxide and absorb oxygen.

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll, producing oxygen as a byproduct.

Photosynthesis is the conversion of sunlight into thermal energy.

Photosynthesis is how plants absorb water through their leaves.

2. Where in the plant does photosynthesis typically occur?

Photosynthesis occurs primarily in plant roots.

Photosynthesis primarily occurs in the leaves of plants, specifically in the chloroplasts.

Photosynthesis happens in the plant's stem.

Photosynthesis takes place in the plant flowers.

3. Which pigment is crucial for the process of photosynthesis?

Carotene is the crucial pigment for photosynthesis.

Xanthophyll is necessary for photosynthesis.

Chlorophyll is the crucial pigment required for photosynthesis.

Melanin is essential for photosynthesis.

4. What are the main products of photosynthesis?

The main products are ATP and NADPH.

Only carbon dioxide and water are produced.

The main products of photosynthesis are glucose and oxygen.

The primary product is protein.

5. What are the main reactants needed for photosynthesis to occur?

The main reactants are nitrogen and methane.

The main reactants needed for photosynthesis are carbon dioxide and water.

The reactants are oxygen and glucose.

Chlorophyll and ATP are the main reactants.

6. What is the equation for photosynthesis?

C6H12O6 + 6H2O + light energy → 6CO2 + O2.

6O2 + C6H12O6 → 6CO2 + 6H2O.

6CO2 + 6H2O + light energy → C6H12O6 + 6O2.

6H2O + 6O2 + light energy → C6H12O6 + 6CO2.

7. Which gas is absorbed during photosynthesis?

Oxygen is absorbed during photosynthesis.

Carbon dioxide is absorbed during photosynthesis.

Nitrogen is absorbed during photosynthesis.

Methane is absorbed during photosynthesis.

8. Which gas is released as a byproduct of photosynthesis?

Oxygen is released as a byproduct of photosynthesis.

Methane is released as a byproduct of photosynthesis.

Carbon dioxide is released as a byproduct of photosynthesis.

Nitrous oxide is released as a byproduct of photosynthesis.

9. What role does sunlight play in photosynthesis?

Sunlight is optional in photosynthesis as plants store energy.

Sunlight is used to cool down the plants during photosynthesis.

Sunlight provides the energy required to drive the photosynthesis reaction.

Sunlight emits oxygen needed for photosynthesis.

10. What is the role of chlorophyll in photosynthesis?

Chlorophyll absorbs light energy and uses it to convert carbon dioxide and water into glucose.

Chlorophyll stores glucose in plants.

Chlorophyll helps in absorbing nutrients from the soil.

Chlorophyll is responsible for releasing glucose from the plant.

11. How does photosynthesis benefit heterotrophs like humans and animals?

Photosynthesis provides atmospheric nitrogen that animals need.

Photosynthesis has no impact on heterotrophs.

Photosynthesis produces oxygen which is essential for respiration in heterotrophs and forms the base of the food chain providing energy-rich compounds like glucose.

Photosynthesis directly supplies energy to heterotrophs like humans.

12. What is the importance of water in the process of photosynthesis?

Water transports glucose to different parts of the plant.

Water provides nitrogen for photosynthesis.

Water provides electrons and hydrogen ions in the light-dependent reactions, and oxygen is released as a byproduct.

Water quenches the plants' thirst during photosynthesis.

13. What effect does light intensity have on the rate of photosynthesis?

Light intensity decreases the rate of photosynthesis.

The rate of photosynthesis generally increases with an increase in light intensity, up to a certain point.

Light intensity has no effect on photosynthesis.

Photosynthesis only occurs in the absence of light.

14. What is the light-dependent reaction in photosynthesis?

The light-dependent reaction is when chlorophyll produces light for the plant.

The light-dependent reaction utilizes sunlight to split water, releasing oxygen, generating ATP, and reducing NADP+ to NADPH.

The light-dependent reaction is the process of converting oxygen into carbon dioxide.

The light-dependent reaction occurs at night storing energy for daylight processes.

15. What happens during the Calvin Cycle?

The Calvin Cycle only absorbs carbon dioxide at night.

During the Calvin Cycle, plants store water for future reactions.

During the Calvin Cycle, ATP and NADPH produced in the light-dependent reactions are used to produce glucose from carbon dioxide.

The Calvin Cycle releases carbon dioxide rather than consuming it.