Q. No.Proton gradient develops across the thylakoid membrane due to all, except
1.
Splitting of water towards lumen side
2.
NADP+ reduction towards stroma side
3.
Movement of protons from lumen to stroma side by PQ
4.
Release of H+ from stroma to lumen side by a H-carrier
C4 and CAM plants have many similarities, like
| 1. | Secondary CO2 fixation by Rubisco |
| 2. | Scotoactive stomata |
| 3. | Primary CO2 fixation by PEPCase in bundle sheath |
| 4. | Presence of Kranz anatomy |
In photorespiration (C2 cycle)
| 1. | Glycolate is oxidised in mitochondria |
| 2. | CO2 is released in peroxisome |
| 3. | Expenditure of ATP occurs |
| 4. | Light is utilised by all three organelles involved |
Calvin cycle (C3 cycle)
| 1. | Is a feature of all chloroplast containing cells in plants |
| 2. | Is the main sugar-producing cycle in C3, C4, and CAM plants |
| 3. | Has both oxidative and reductive reactions |
| 4. | Occurs in darkness only |
In Hatch and Slack pathway, the primary CO2 acceptor is -
1. Oxaloacetic acid
2. Phosphoglyceric acid
3. Phosphoenol pyruvate
4. Rubisco
One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of:
| 1. | Violet and green light | 2. | Indigo and green light |
| 3. | Orange and yellow light | 4. | Blue and red light |
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
According to the chemiosmotic hypothesis, there is a basic difference between respiration and photosynthesis. This is _____
| 1. | In chloroplast, H+ accumulation takes place in the lumen of thylakoid but in mitochondria, this takes place in perimitochondrial space. |
| 2. | Accumulation of H+ in chloroplast takes place in matrix i.e., stroma and in mitochondria, this takes place in cristae. |
| 3. | In both the mitochondria and chloroplast the accumulation of H+ takes place in inter-membranous space but with a high rate in mitochondria |
| 4. | Both 1 and 3 are correct. |
Match the following columns and select the correct option.
| Column-I | Column-II |
| a. Photolysis of water | (i) C plants |
| b. Carboxylation of RuBP | (ii) Non-cyclic photophosphorylation |
| c. Synthesis of ATP only | (iii) Cyclic photophosphorylation |
| d. Consumption of 5 ATP per CO2 fixed |
(iv) Calvin cycle |
| 1. | a (ii), b (iv), c (iii), d (i) |
| 2. | a (iii), b (iv), c (ii), d (i) |
| 3. | a (ii), b (i), c (iii), d (iv) |
| 4. | a (iii), b (i), c (ii), d (iv) |
Select the Incorrect statement from the following.
| 1. | Nostoc performs oxygenic photosynthesis. |
| 2. | During photorespiration, O2 is first utilized in chloroplast, and CO2 is released in mitochondria. |
| 3. | In a chloroplast, lumen of thylakoids always have least number of protons during photophosphorylation. |
| 4. | In the plants like sugarcane and Amaranthus, primary CO2 acceptor is phosphoenol pyruvate. |
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