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

When CO₂ is added to PEP, the first stable product synthesized is

1. pyruvate

2. glyceraldehyde-3-phosphate

3. phosphoglycerate

4. oxaloacetate

The enzyme that is not found in a C₃ plant is

1.  RuBP carboxylase

2.  PEP carboxylase

3.  NADP reductase

4.  ATP synthase

The correct sequence of flow of electrons in the light reaction is:

Splitting of water is associated with

PEP is primary CO₂ acceptor in

Which pigment acts directly to convert light energy to chemical energy ? 

1. Chlorophyll a 

2. Chlorophyll b 

3. Xanthophyll 

4. Carotenoid 

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 light  range is most effective in photosynthesis ? 

1.  Blue 

2. Green 

3. Red 

4. Violet 

Chemosynthetic bacteria obtain energy from 

1. Sun 

2. Infra red rays 

3. Organic substances 

4. Inorganic chemicals