Botany - Photosynthesis Book Back Questions

11th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Biology

Time : 00:30:00 Hrs
Total Marks : 15
    3 x 1 = 3
  1. Assertion (A): Increase in Proton gradient inside lumen responsible for ATP synthesis
    Reason (R): Oxygen-evolving complex of PS I located on thylakoid membrane facing Stroma, releases H+ ions

    (a)

    Both Assertion and Reason are True.

    (b)

    Assertion is True and Reason is False.

    (c)

    Reason is True and Assertion is False.

    (d)

    Both Assertion and Reason are False.

  2. The correct sequence of flow of electrons in the light reaction is

    (a)

    PS II, plastoquinone, cytochrome, PS I, ferredoxin.

    (b)

    PS I, plastoquinone, cytochrome, PS II ferredoxin.

    (c)

    PS II, ferredoxin, plastoquinone, cytochrome, PS I.

    (d)

    PS I, plastoquinone, cytochrome, PS II, ferredoxin.

  3. Identify true statement regarding the light reaction of photosynthesis?

    (a)

    Splitting of water molecule is associate with PS I.

    (b)

    PS I and PS II involved in the formation of NDPH + H+

    (c)

    The reaction center of PS I is Chlorophyll a with the absorption peak at 680 nm.

    (d)

    The reaction center of PS II is Chlorophyll a with the absorption peak at 700 nm.

  4. 2 x 2 = 4
  5. Two groups (A & B) of bean plants of similar size and same leaf area were placed in identical conditions. Group A was exposed to the light of wavelength 400-450nm & Group B to the light of the wavelength of 500- 550nm. Compare the photosynthetic rate of the 2 groups giving reasons.

  6. When there is plenty of light and the higher concentration of O2, what kind of pathway does the plant undergo? Analyse the reasons.

  7. 1 x 3 = 3
  8. Grasses have an adaptive mechanism to compensate photorespiratory losses- Name and describe the mechanism.

  9. 1 x 5 = 5
  10. In Botany class, the teacher explains, Synthesis of one glucose requires 30 ATPs in C4 plants and only 18 ATPs in C3plants. The same teacher explains C4 plants are more advantageous than C3 plants. Can you identify the reason for this contradiction?

*****************************************

TN 11th Standard Biology free Online practice tests

Reviews & Comments about 11th Botany - Photosynthesis Book Back Questions

Write your Comment