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.
You will be redirected in
3 sec
