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

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

PEP is primary CO₂ acceptor in

The enzyme that is not found in a C₃ plant is

1.  RuBP carboxylase

2.  PEP carboxylase

3.  NADP reductase

4.  ATP synthase

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

1. pyruvate

2. glyceraldehyde-3-phosphate

3. phosphoglycerate

4. oxaloacetate

Chemosynthetic bacteria obtain energy from 

1. Sun 

2. Infra red rays 

3. Organic substances 

4. Inorganic chemicals

The reaction that is responsible for the primary fixation of CO₂ is catalysed by

Which light  range is most effective in photosynthesis ? 

1.  Blue 

2. Green 

3. Red 

4. Violet 

Splitting of water is associated with