Cyclic photophosphorylation invloves
| 1. | PS I | 2. | PS II | 
| 3. | PS I and PS II | 4. | P680 | 
The first stable product of Calvin cycle is
| 1. | 3-phosphoglycerate | 
| 2. | 1, 3 biphosphoglycerate | 
| 3. | glyceraldehyde - 3 phosphate | 
| 4. | ribulose - 5- phosphate | 
PS-II occurs only in
| 1. | stroma | 
| 2. | granal thylakoids | 
| 3. | stromal lamella | 
| 4. | matrix | 
Which of the following statements is correct?
| 1. | Photorespiration is useful process. | 
| 2. | C4 plants are more efficient than C3 plants. | 
| 3. | C4 plants are less efficient than C3 plants. | 
| 4. | Photorespiration is absent in C3 plants but present in C4 plants. | 
Photorespiration shows formation of
| 1. | sugar but not ATP | 
| 2. | ATP but not sugar | 
| 3. | both ATP and sugar | 
| 4. | neither ATP nor sugar | 
Kranz anatomy is usually associated with
| 1. | C3 plants | 
| 2. | C4 plants | 
| 3. | CAM plants | 
| 4. | C3-C4 intermediate plants. | 
C4 plants have better productivity because
| 1. | C4 plants absorb more light | 
| 2. | C4 plants absorb more CO2 | 
| 3. | C4 plants does not carry photorespiration | 
| 4. | C4 plants have more amount of RuBisCO. | 
The first carbon dioxide fixation product of C4 plant is
| 1. | Oxaloacetic acid | 2. | ribulose biphosphate | 
| 3. | phosphoenol pyruvate | 4. | phosphoglyceric acid. | 
Carbon dioxide is necessary for photosynthesis. The chemical used to remove this gas most effectively from entering a control apparatus is
1. calcium oxide
2. distilled water
3. potassium hydroxide solution
4. sodium carbonate.
Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because
| 1. | The primary fixation of CO2 is mediated via PEP carboxylase | 
| 2. | Effective pumping of CO2 into bundle sheath cells | 
| 3. | Four carbon acids are the primary initial CO2 fixation products | 
| 4. | RuBisCO in C4 plants has a higher affinity for CO2 |