Important Questions for Class 11 Chapter 13 - Photosynthesis in Higher Plants

Important questions based on NCERT syllabus for Chapter 13 - Photosynthesis in Higher Plants:

Question-1: Chlorophyll a is the primary pigment for light reaction. What are accessory pigments? What is their role in photosynthesis?

Solution: Accessory pigments are those pigments, which assist in photosynthesis by capturing energy from light of different wavelengths, e.g., chlorophyll b, Xanthophylls and carotenoids.
Role in Photosynthesis:
They absorb wavelength of light not absorbed by chlorophyll a and transfer the energy to chlorophyll.
They also protect chlorophyll a from photo-oxidation.

Question-2: Do reactions of photosynthesis called, as ‘Dark Reaction’ need light? Explain.

Solution: ATP and NADPH are used to drive the processes leading to the synthesis of food, more accurately, sugars. This is the biosynthetic phase or dark reaction of photosynthesis. This process does not directly depend on the presence of light but is dependent on the products of the light reaction, i.e., ATP and NADPH, besides C02 and H20.

Question-3: How are photosynthesis and respiration related to each other?

Solution: Photosynthesis and respiration are related to each other as
Both processes take place in double membrane bound organelles.
In both processes ATP synthesis takes place.
In both processes electron transport system requires.