Photosynthesis in Higher Plants · Question 45

Study the pathway given below: [figure] In which of the following options correct words for all the three blanks A, B and C are indicated?

1. A Fixation, B Transamination, C Regeneration
2. A Decarboxylation, B Reduction, C Regeneration
3. A Carboxylation, B Decarboxylation, C Reduction
4. A Fixation, B Decarboxylation, C Regeneration

PGA as the first CO2 fixation product was discovered in photosynthesis of

1. bryophyte
2. gymnosperm
3. angiosperm
4. alga

C4 plants are more efficient in photosynthesis than C3 plants due to

1. higher leaf area
2. presence of larger number of chloroplasts in the leaf cells
3. presence of thin cuticle
4. lower rate of photorespiration

Cyclic photophosphorylation results in the formation of

1. ATP and NADPH
2. ATP, NADPH and O2
3. ATP
4. NADPH.

Stroma in the chloroplasts of higher plants contains

1. light-dependent reaction enzymes
2. ribosomes
3. chlorophyll
4. light-independent reaction enzymes.

Electrons from excited chlorophyll molecule of photosystem II are accepted first by

1. quinone
2. ferredoxin
3. cytochrome-b
4. cytochrome-f

The C4 plants are photosynthetically more efficient than C3 plants because

1. the CO2 efflux is not prevented
2. they have more chloroplasts
3. the CO2 compensation point is more
4. CO2 generated during photorespiration is trapped and recycled through PEP carboxylase

In leaves of C4 plants malic acid synthesis during CO2 fixation occurs in

1. bundle sheath
2. guard cells
3. epidermal cells
4. mesophyll cells

In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of

1. bundle sheath
2. phloem
3. epidermis
4. mesophyll

The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is

1. iron-sulphur protein
2. ferredoxin
3. quinone
4. cytochrome