Biology

Photosynthesis in Plants

1,508 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 bio-chemistry biological oxidation oxidative phosphorylation living organisms and energy production glycolysis

Centre of phosphorylation is

  1. Ribosome

  2. Oxisome

  3. Peroxisome

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

  • Oxidative phosphorylation refers to the process by which ATP molecules (energy currency) are produced in the mitochondria.
  • ATP is produced by the transfer of electrons from NADH or FADH2 to oxygen molecule with the help of electron carriers.
  • Oxysomes or F0-F1 particles refers to small round structures present within the folds of the cristae of the inner mitochondrial membrane.
  • F0 and F1 particles are found in the inner mitochondrial region and are attached to the cristae and help in ATP production and oxidation.
So, the correct answer is 'Oxisome'.

Multiple choice bio-chemistry absorption by roots - the processes involved diffusion transport across membrane means of transport

In photosynthesis, oxygen is given out by the process of

  1. Diffusion

  2. Osmosis

  3. Transpiration

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Diffusion is a process in which the molecules intermingle due to their kinetic energy and movement of molecules is from higher concentration to lower concentration. During photosynthesis, the plant produces oxygen as a byproduct and hence the concentration of oxygen inside the cell is higher than the outer environment. Plant releases oxygen in external environment through diffusion process.

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

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 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.