Home
Class 11
BIOLOGY
Assertion: Accessory pigments enable a w...

Assertion: Accessory pigments enable a wider range of wavelength of incoming light to be utilised for photosynthesis.
Reason: Accessory pigments also protect chlorophyll a from photo-oxidation.

A

If both assertion and reason are true and the reason 1s the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B

Accesory pigments enable a wider range of wave-length of incoming light to be utlised for photosynthesis.
Accessory pigments also protect chlorophyll a from photo-oxidation.
Promotional Banner

Topper's Solved these Questions

  • PHOTOSYNTHESIS IN HIGHER PLANTS

    A2Z|Exercise SECTION C : Previous Years' Examination Questions (NEET/AIPMT Questions)|80 Videos
  • PHOTOSYNTHESIS IN HIGHER PLANTS

    A2Z|Exercise SECTION C : Previous Years' Examination Questions (AIIMS QUESTIONS )|13 Videos
  • PHOTOSYNTHESIS IN HIGHER PLANTS

    A2Z|Exercise Section A : Topicwise Questions Topic 3 : Dark Reaction (the Calvin Cycle)|27 Videos
  • NEURAL CONTROL AND COORDINATION

    A2Z|Exercise Section D : Chapter-end Test|50 Videos
  • PLANT GROWTH AND DEVELOPMENT

    A2Z|Exercise Section D : Chapter-end Test|50 Videos

Similar Questions

Explore conceptually related problems

Assertion :- Presence of accessory pigments enhances rate of photosynthesis. Reason :- They enable a wider range of wavelength of incoming light to be utilised for photosynthesis.

Carotenoids are I. yellow to orange pigments, which absorb light strongly in the blue - voiltet range. II. Called shield pigments because they protect chlorophyll from photo -oxidation. III. Magnesium porphyrin compounds. IV. Red and blue pigments

A : Carotenoids protect plant from excessive heat and prevent photoxidation of chlorophyll. R : Carotenodis enable a wider range of wavelength of incoming light to be utilised for photosynthesis.

Which of the following statement is / are incorrect ? (i) Green light falling in the range of wavelength 500 0 -580 nm is least effective for photosynthesis. (ii) In non - cyclic photophosphorylation, the electron expelled from the reaction centre is not cycled back , though its loos is compensated by electrons from the photolysis of water . (iii) Chl a , Chl b , carotenoids , and xanthophylls are insoluble in organic solvents. (iv) 400-700 nm light is used in photosynthesis also known as PAR. (v) Red light is the most effective for photosynthesis.

Assertion : Carotences and xanthophylls are soluble in ether. Reson : There are accessory pigments of photosynthesis.

Which of the following pigments absorbs light and prevents photo-oxidation of chlorophyll ?

Assertion: Chlorophyll a is the chief pigment associated with photosynthesis. Reason: In the blue and red regions of spectrum, there is maximum absorption by chlorophyll- a, also shows higher rate of photosynthesis

Assertion : Carotenoids are accessory pigments. Reason : Absorbed light energy is transferred to reaction centre by carotenoids.

Assertion: In the body of earthworm, porphyrin pigment is found. Reason: Because it protects earthworm from chrmicals.