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

Oxygen is produced in plants by

  1. photosynthesis

  2. anaerobic respiration

  3. aerobic respiration

  4. transpiration

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Yes, it is correct. By using the energy of sunlight, plants convert carbon dioxide and water into carbohydrates and oxygen during photosynthesis.

Multiple choice

The site of photosynthesis is

  1. mitochondria

  2. chloroplast

  3. xylem

  4. root hair

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chloroplasts contain chlorophyll and are the specialized organelles where photosynthesis occurs. They house both light-dependent reactions (in thylakoids) and light-independent reactions (in stroma) to convert light energy to chemical energy.

Multiple choice

Which of the following statements is/are false?

a. The substances that have an ability to absorb light at specific wavelengths are called pigments. b. The membrane system is responsible for the synthesis of ATP and NADPH. c. Most of the photosynthesis takes place in the yellow and green regions of the spectrum.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option as this statement is false. Most of the photosynthesis takes place in the blue and red regions of the spectrum.

Multiple choice

Which of the following is not a characteristic of C4 plants?

  1. C4 plants show a response to high light intensities.

  2. C4 plants lack a process called photorespiration.

  3. C4 plants have a special type of leaf anatomy.

  4. C4 plants cannot tolerate higher temperatures.

  5. C4 plants have greater productivity of biomass.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option as this is not a characteristic of C4 plants. They can tolerate higher temperatures.

Multiple choice

Which of the following statements is/are false?

a. In carbon fixation cycle, carbon dioxide is added by ATPase enzyme to a 5-carbon compound RuBP. b. Light harvesting complexes are made up of hundreds of pigment molecules bound to proteins. c. The enzyme NADP reductase is located on the stroma side of the membrane.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

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

This is the correct option as this statement is false. 

Multiple choice

Match the following ||| |---|---| |a. Carboxylation phase|1. During this phase, carbohydrate is formed at the expense of the photochemically made ATP and NADPH.| |b. Reduction phase|2. During this phase, CO2 combines with ribulose-1,5-bisphosphate.| |c. Regeneration phase|3. During this phase, the CO2 acceptor ribulose-1,5-bisphosphate is formed again, so that the cycle continues.|

  1. a - 3, b - 1, c - 2

  2. a - 2, b - 1, c - 3

  3. a - 1, b - 2, c - 3

  4. a - 3, b - 2, c - 1

  5. a - 2, b - 3, c - 1
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 During carboxylation phase, CO2 combines with ribulose-1,5-bisphosphate. During reduction phase, carbohydrate is formed at the expense of the photochemically made ATP and NADPH. During regeneration phase, the CO2 acceptor ribulose-1,5-bisphosphate is formed again, so that the cycle continues.

Multiple choice

What are the end products of photosynthesis?

  1. Carbohydrate + oxygen

  2. Minerals + oxygen

  3. Carbon dioxide + oxygen

  4. Water + oxygen
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Photosynthesis is the process of formation of food by green plants using inorganic raw materials. The products formed during the process are carbohydrates, i.e. glucose along with the release of oxygen. 

Multiple choice

Which of the following photosynthetic pigments are not found in higher plants and green algae?

P. α-Chlorophyll Q. β-Chlorophyll R. Chlorophyll c S. Phycobilin

  1. P and Q

  2. Q and R

  3. Q and S

  4. R and S

  5. Q, R and S
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This option is correct because Chlorophyll c is found only in the photosynthetic members of the chromista as well as the dinoflagellates and Phycobilins are water-soluble pigments, and are therefore, found in the cytoplasm or in the stroma of the chloroplast. They occur only in Cyanobacteria and Rhodophyta.