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 zoology respiration in organisms active transport and passive transport types of plant transport atp

The assimilatory power in photosynthesis is

  1. ATP.

  2. NADPH.
  3. ATP and NADPH$ _2$.
  4. ATP, NAPDH and CO$ _2$.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The phase of reactions in photosynthesis which involves the direct sunlight is called light reaction. This reaction takes place inside the grana of chloroplast. In this reaction assimilatory power ATP and NADPH$ _2$ are generated with evolution of oxygen and photolysis of water. These assimilatory powers help in the fixation of carbon dioxide during dark phase reaction.

Multiple choice

The process by which plants convert sunlight into energy is called:

  1. Photosynthesis

  2. Respiration

  3. Transpiration

  4. Decomposition

  5. Pollination
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to produce glucose and oxygen.

Multiple choice

What is the term used to describe the process by which plants convert sunlight into energy through photosynthesis?

  1. Transpiration

  2. Photosynthesis

  3. Respiration

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

Photosynthesis is the process by which plants use sunlight to convert carbon dioxide and water into glucose and oxygen.

Multiple choice

The process by which mangroves help to trap and store carbon dioxide is known as:

  1. Photosynthesis

  2. Carbon sequestration

  3. Respiration

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

Mangroves play a significant role in carbon sequestration, absorbing carbon dioxide from the atmosphere and storing it in their biomass and sediments.

Multiple choice

What is the role of seagrass meadows in the carbon cycle?

  1. They absorb carbon dioxide from the atmosphere.

  2. They release carbon dioxide into the atmosphere.

  3. They have no role in the carbon cycle.

  4. They both absorb and release carbon dioxide.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Seagrass meadows both absorb and release carbon dioxide. They absorb carbon dioxide through photosynthesis and release carbon dioxide through respiration. However, they absorb more carbon dioxide than they release, so they are a net sink for carbon dioxide.

Multiple choice

Which process in plants converts light energy into chemical energy?

  1. Cellular Respiration

  2. Photosynthesis

  3. Glycolysis

  4. Electron Transport Chain
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Photosynthesis is the process by which plants and certain organisms use light energy to convert carbon dioxide and water into glucose and oxygen.

Multiple choice

What is the primary pigment responsible for capturing light energy in photosynthesis?

  1. Chlorophyll a

  2. Chlorophyll b

  3. Carotenoids

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

Chlorophyll a is the primary pigment in plants that absorbs light energy from the sun and initiates the process of photosynthesis.

Multiple choice

Which stage of photosynthesis occurs in the thylakoid membranes of chloroplasts?

  1. Calvin Cycle

  2. Krebs Cycle

  3. Electron Transport Chain

  4. Light Reactions
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The light reactions of photosynthesis take place in the thylakoid membranes of chloroplasts, where light energy is converted into ATP and NADPH.

Multiple choice

What is the role of NADPH in photosynthesis?

  1. Electron Acceptor

  2. Glucose Breakdown

  3. ATP Production

  4. Carbon Dioxide Fixation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

NADPH provides reducing power for the Calvin Cycle, where carbon dioxide is fixed into organic molecules, such as glucose.

Multiple choice

Which stage of photosynthesis occurs in the stroma of chloroplasts?

  1. Light Reactions

  2. Electron Transport Chain

  3. Glycolysis

  4. Calvin Cycle
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Calvin Cycle, also known as the dark reactions of photosynthesis, takes place in the stroma of chloroplasts, where carbon dioxide is fixed into organic molecules using ATP and NADPH.

Multiple choice

What is the primary product of photosynthesis?

  1. Oxygen

  2. Glucose

  3. Carbon Dioxide

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

The primary product of photosynthesis is glucose, a sugar molecule that serves as a source of energy for plants and other organisms.

Multiple choice

What is the role of coenzymes in cellular respiration and photosynthesis?

  1. Electron Carriers

  2. Energy Storage

  3. Substrate Binding

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

Coenzymes, such as NADH and FADH2, act as electron carriers in cellular respiration and photosynthesis, transferring electrons between different molecules and facilitating energy transfer.

Multiple choice

What is the function of the chloroplast?

  1. Cellular respiration

  2. Photosynthesis

  3. Protein synthesis

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

The chloroplast is responsible for photosynthesis, which is the process by which plants use sunlight to convert carbon dioxide and water into glucose and oxygen.

Multiple choice

What is the term for the process by which plants convert light energy into chemical energy?

  1. Photosynthesis

  2. Cellular respiration

  3. Fermentation

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

Photosynthesis is the process by which plants convert light energy into chemical energy, primarily in the form of glucose.

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 storage

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

Carbon sequestration refers to the process by which plants absorb carbon dioxide from the atmosphere during photosynthesis and store it in their tissues.