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Solved Examples on Photosynthesis in Higher Plants

Question1: In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of [CBSE PMT’2007]

(a) bundle sheath

(b) phloem

(c) epidermis

(d) mesophyll

Answer: d

Solution:

In C4 plants, C4 cycle occurs in mesophyll cells and C3 cycle occurs in bundle sheath.

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Question2: Electrons from excited chlorophyll molecule of photosystem II are accepted first by: [CBSE PMT’2008]

 (a) Cytochrome-b

(b) Cytochrome-f

(c) Quinone

(d) Ferredoxin

Answer: c

Solution:

Electrons from excited chlorophyll molecules of photosystem II are accepted first by quinine. Photosystem II is a photosynthetic pigment system along with some electron carriers that is located in the appressed part of the grana thyllakoids. Photosystem II has chlorophyll a, b and carotenoids. Other components of PS II are phaeophytin, plastoquinone (PQ), cytochrome complex and blue coloured copper containing plastocyanin.

Question3: Importance of day length in flowering parts of plants was first shown in [CBSE PMT’2008]

(a)...

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