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KVPY Sample Paper KVPY Stream-SX Model Paper-16

  • question_answer
    The \[{{C}_{3}}\], \[{{C}_{4}}\] and CAM pathways are the major \[C{{O}_{2}}\] fixing pathways present in plants given in Column-II. Column-I has a few statements relating to one or more of the pathway.
    Column-I Column-II
    P. The Calvin cycle operates in the chloroplast (i) \[{{\operatorname{C}}_{3}}\]
    Q. The primary carboxylation is catalyzed by RuBisCO (ii) \[{{\operatorname{C}}_{4}}\] pathway
    R. The atmospheric \[{{\operatorname{CO}}_{2}}\] is first fixed during the day (iii) CAM pathway
    S. The whole process of \[{{\operatorname{CO}}_{2}}\] uptake and its fixation take place in a single cell
    Select the option with correct combination of pathway pain ways and statement

    A) P - (III), Q - (I) and (II), R - (I) and (II), S-(I) and (III)

    B) P - (I), (II) and (III), Q - (I), R- (I) and (II), S-(I) and (III)

    C) P-(I), (II) and (III), Q-(I) and (III).R-(I), S-(I) and (II)

    D) P-(I), (II) and (III), Q-(I) and (III), R-(I), S-(I) and (II)

    Correct Answer: B

    Solution :

    Calvin cycle occurs in the chloroplasts of plants exhibiting all the three pathways. Rubis CO carries out first carboxylation in \[{{C}_{3}}\]plants only. The \[{{\operatorname{CO}}_{2}}\] is fixed during day in plants exhibiting \[{{\operatorname{C}}_{3}}\] and \[{{\operatorname{C}}_{4}}\]. The whole process of \[{{\operatorname{CO}}_{2}}\] uptake and its fixation take place in a single cell of plants exhibiting  \[{{C}_{3}}\] and CAM plants.


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