Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Select the correct statement: (1) \[{{C}_{4}}\]pathway for \[C{{O}_{2}}\]fixation were discovered by Hatch and Slack (2) \[C{{O}_{2}}\]is essential for photosynthesis (3) Addition of sodium carbonate in water retards photosynthetic rate in vallisneria (4) Phloem is the principal pathway for translocation of solutesA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 1, 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: C
Solution :
Hatch and Slack, 1966 discovered an alternate pathway of \[C{{O}_{2}}\]fixation. In this scheme the \[C{{O}_{2}}\] acceptor is phosphoenolpymic acid(PEPA) and the first product is oxaloacetic acid. The first product of this cycle is 4-carbon compound, hence, it is popularly called as \[{{C}_{4}}\]cycle and the plants where it is found as \[{{C}_{4}}\] plants. \[C{{O}_{2}}\]is essential for photosynthesis. \[\text{6C}{{\text{O}}_{\text{2}}}\text{+6}{{\text{H}}_{\text{2}}}\text{O}\xrightarrow[\text{Chlorophyll}]{\text{Sunlight}}{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{12}}}{{\text{O}}_{\text{6}}}\text{+6}{{\text{O}}_{\text{2}}}\] Transport of food from leaves to other parts of the plant with the help of phloem is called translocation.You need to login to perform this action.
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