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

The dark reaction of photosynthesis or Calvin Cycle refers to the pathway in which the free energy of ATP and reducing power of NADPH are used to fix CO2 to form carbohydrate. The first stable product of the dark reaction of photosynthesis is called _____________.

  1. RuBP

  2. glyceraldehyde-3-phosphate

  3. RuBisCO

  4. phosphoglycolate

  5. 3-Phosphoglycerate
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

3-Phosphoglycerate (PGA), a 3 carbon molecule is the first stable product of dark reaction of photosynthesis. Hence this pathway is also called C3 pathway.

Multiple choice

Match the columns:

 
Name of Element
Specific Role in plants
1. Manganese a. In the transfer of electron to P.S. II
2. Boron b. Catalyses oxidation reduction reactions
3. Copper c. Facilitates translocation of sugars
4. Chlorine d. Required during evolution of O2 in photosynthesis
  1. 1. Manganese d. Required during evolution of O2 in Photosynthesis
    2. Boron c. Facilitates translocation of sugars
    3. Copper b. Catalyzes oxidation reduction reaction
    4. Chlorine a. In the transfer of electrons to P.S.II
  2. 1. Manganese a. In the transfer of electrons to P.S. II
    2. Boron d. Required during evolution of O2 in photosynthesis
    3. Copper c. Facilitates translocation of sugars
    4. Chlorine b. Catalyses oxidation reduction reaction
  3. 1. Manganese b. Catalyses oxidation reduction reactions
    2.Boron c. Facilitates translocation of sugars
    3. Copper d. Required during evolution of O2 in photosynthesis
    4. Chlorine a. In the transfer of electrons to P.S. II
  4. 1. Manganese c. Required during evolution of O2 in photosyntesis
    2. Boron b. Catalyses oxidation reduction reactions
    3. Copper d. Required during evolution of O2 in photosynthesis
    4. Chlorine a. In the transfer of electrons to P.S. II
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct match.

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.