Help me with appropriate answer..

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Photosynthesis in Higher Plants

Short Answer Type

91. Name two green house crops. What is the type of these plants and why are they used in the green houses?

127 Views

Long Answer Type

92. Describe Priestley’s experiment.

366 Views

Short Answer Type

93. Why a plant cannot survive for long time at compensation point ?

129 Views

94. What does the chemiosmotic hypothesis state?

446 Views

95. Name the products of light reaction and where they are used ?

193 Views

96. By looking at a plant externally can you tell whether a plant is C₃ or C₄? Why and how?

209 Views

97. By looking at which internal structure of a plant can you tell whether a plant is C₃ or C₄? Explain.

220 Views

Long Answer Type

98. Even though a very few cells in a C₄ plant carry out the biosynthetic – Calvin pathway, yet they are highly productive. Can you discuss why?

220 Views

Short Answer Type

99. RuBisCo is an enzyme that acts both as a carboxylase and oxygenase. Why do you think RuBisCo carries out more carboxylation in C₄ plants?

414 Views

Long Answer Type

100. Suppose there were plants that had a high concentration of Chlorophyll-b, but lacked chlorophyll-a, would it carry out photosynthesis? Then why do plants have chlorophyll-b and other accessory pigments?

The plant having high concentration of chlorophyll-b but lacking chlorophyll-a will not carry out photosynthesis.
Chlorophyll-a molecules forms the reaction centre and acts as the main pigment molecules. The other pigments like chlorophyll-b and other photosynthetic pigments such as carotenoids and xanthophylls act as accessory pigments. Their role is to absorb the different wavelength of light and make the process of photosynthesis efficient. Carotenoids and xanthophylls also protect the chlorophyll molecule from photo-oxidation.

243 Views