Dark reaction in photosynthesis is called so because:
1. It can occur in dark also
2. It does not depend on light energy
3. It cannot occur during day light
4. It occurs more rapidly at night
During light reaction in photosynthesis the following are formed :
1. ATP and sugar
2. Hydrogen , O2 and sugar
3. ATP, hydrogen donor and O2
4. ATP, hydrogen and O2 donor
Energy required for ATP synthesis in PSII comes from
1. Proton gradient '
2. Electron gradient
3. Reduction of glucose
4. Oxidation of glucose
Chemosynthetic bacteria obtain energy from
1. Sun
2. Infra red rays
3. Organic substances
4. Inorganic chemicals
Which light range is most effective in photosynthesis ?
1. Blue
2. Green
3. Red
4. Violet
Which range of wavelength (in nm) is called photosynthetically active radiation (PAR) ?
1. 100 - 390
2. 390-430
3. 400 - 700
4. 760- 100,00
Which pigment acts directly to convert light energy to chemical energy ?
1. Chlorophyll a
2. Chlorophyll b
3. Xanthophyll
4. Carotenoid
When CO2 is added to PEP, the first stable product synthesized is
1. pyruvate
2. glyceraldehyde-3-phosphate
3. phosphoglycerate
4. oxaloacetate
The reaction that is responsible for the primary fixation of CO2 is catalysed by
1. RUBP carboxylase
2. PEP carboxylase
3. RuBP carboxylase and PEP carboxylase
4. PGA synthase
The enzyme that is not found in a C3 plant is
1. RuBP carboxylase
2. PEP carboxylase
3. NADP reductase
4. ATP synthase