Biology

Photosynthesis in Plants

1,492 Questions

Photosynthesis is the biological process by which plants convert light energy into chemical energy. This page contains practice questions covering essential topics like chlorophyll, light reactions, and the pathways specific to plants. This material is crucial for medical entrance exams and academic assessments.

Chlorophyll and pigmentsLight reactionsCalvin cycleCAM plantsElectron transportPhotosynthesis factors

Photosynthesis in Plants Questions

Multiple choice

What is the overall chemical equation for photosynthesis?

  1. 6CO2 + 6H2O + light energy → C6H12O6 + 6O2

  2. 6CO2 + 12H2O + light energy → C6H12O6 + 6O2

  3. 12CO2 + 6H2O + light energy → 2C6H12O6 + 6O2

  4. 12CO2 + 12H2O + light energy → 2C6H12O6 + 12O2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The overall chemical equation for photosynthesis is 6CO2 + 6H2O + light energy → C6H12O6 + 6O2. This equation represents the conversion of carbon dioxide and water into glucose and oxygen using light energy.

Multiple choice

Where does the light-dependent reaction of photosynthesis take place?

  1. Stroma

  2. Thylakoid membranes

  3. Cytoplasm

  4. Nucleus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The light-dependent reaction of photosynthesis takes place in the thylakoid membranes of chloroplasts. These membranes contain chlorophyll and other pigments that absorb light energy.

Multiple choice

What is the primary product of the light-dependent reaction of photosynthesis?

  1. ATP

  2. NADPH

  3. Glucose

  4. Oxygen
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

The primary products of the light-dependent reaction of photosynthesis are ATP and NADPH. These molecules are used to provide energy and reducing power for the Calvin cycle.

Multiple choice

Where does the Calvin cycle of photosynthesis take place?

  1. Stroma

  2. Thylakoid membranes

  3. Cytoplasm

  4. Nucleus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Calvin cycle of photosynthesis takes place in the stroma of chloroplasts. This is the site where carbon dioxide is fixed into organic molecules.

Multiple choice

What is the primary product of the Calvin cycle of photosynthesis?

  1. ATP

  2. NADPH

  3. Glucose

  4. Oxygen
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The primary product of the Calvin cycle of photosynthesis is glucose. This is a sugar molecule that is used by plants for energy and growth.

Multiple choice

What is the role of oxygen in photosynthesis?

  1. It is a product of photosynthesis.

  2. It is a reactant in photosynthesis.

  3. It is necessary for the light-dependent reaction.

  4. It is necessary for the Calvin cycle.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Oxygen is a product of photosynthesis. It is released as a waste product of the light-dependent reaction.

Multiple choice

What is the role of water in photosynthesis?

  1. It is a product of photosynthesis.

  2. It is a reactant in photosynthesis.

  3. It is necessary for the light-dependent reaction.

  4. It is necessary for the Calvin cycle.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water is a reactant in photosynthesis. It is used to provide electrons for the light-dependent reaction and hydrogen atoms for the Calvin cycle.

Multiple choice

What is the role of carbon dioxide in photosynthesis?

  1. It is a product of photosynthesis.

  2. It is a reactant in photosynthesis.

  3. It is necessary for the light-dependent reaction.

  4. It is necessary for the Calvin cycle.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbon dioxide is a reactant in photosynthesis. It is used to provide carbon atoms for the Calvin cycle.

Multiple choice

What is the role of chlorophyll in photosynthesis?

  1. It absorbs light energy.

  2. It converts light energy into chemical energy.

  3. It transports electrons.

  4. It fixes carbon dioxide.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chlorophyll is a green pigment that absorbs light energy. This energy is used to drive the light-dependent reaction of photosynthesis.

Multiple choice

What is the role of ATP in photosynthesis?

  1. It provides energy for the light-dependent reaction.

  2. It provides energy for the Calvin cycle.

  3. It transports electrons.

  4. It fixes carbon dioxide.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

ATP provides energy for the Calvin cycle. This energy is used to drive the reactions that convert carbon dioxide into glucose.

Multiple choice

What is the role of NADPH in photosynthesis?

  1. It provides energy for the light-dependent reaction.

  2. It provides energy for the Calvin cycle.

  3. It transports electrons.

  4. It fixes carbon dioxide.
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

NADPH provides reducing power for the Calvin cycle. This reducing power is used to convert carbon dioxide into glucose.

Multiple choice

What is the role of the Calvin cycle in photosynthesis?

  1. It fixes carbon dioxide into organic molecules.

  2. It converts light energy into chemical energy.

  3. It transports electrons.

  4. It releases oxygen.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Calvin cycle is the process by which carbon dioxide is fixed into organic molecules. This process uses the energy and reducing power from the light-dependent reaction to convert carbon dioxide into glucose.

Multiple choice

What is the role of the light-dependent reaction in photosynthesis?

  1. It fixes carbon dioxide into organic molecules.

  2. It converts light energy into chemical energy.

  3. It transports electrons.

  4. It releases oxygen.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The light-dependent reaction is the process by which light energy is converted into chemical energy. This energy is used to drive the Calvin cycle.

Multiple choice

What is the role of oxygen in the Calvin cycle?

  1. It is a product of the Calvin cycle.

  2. It is a reactant in the Calvin cycle.

  3. It is necessary for the light-dependent reaction.

  4. It is necessary for the Calvin cycle.
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Oxygen is not involved in the Calvin cycle. It is a product of the light-dependent reaction.

Multiple choice

What is the term used to describe the process by which plants absorb carbon dioxide from the atmosphere during photosynthesis?

  1. Carbon Sequestration

  2. Carbon Capture

  3. Carbon Fixation

  4. Carbon Storage
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbon fixation is the process by which plants, algae, and some bacteria convert carbon dioxide into organic compounds during photosynthesis.