Photosynthesis in Higher Plants · Question 48

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

During photorespiration, the oxygen consuming reaction(s) occur in

1. stroma of chloroplasts
2. stroma of chloroplasts and mitochondria
3. stroma of chloroplasts and peroxisomes
4. grana of chloroplasts and peroxisomes

In photosystem I, the first electron acceptor is

1. an iron-sulphur protein
2. ferredoxin
3. cytochrome
4. plastocyanin

As compared to a C3-plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by C4-plants?

1. Two
2. Six
3. Twelve
4. Zero