Law of limiting factor was given by from Biology Photosynthesis

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 Multiple Choice QuestionsMultiple Choice Questions

251.

Which one of the following is wrong in relation to photorespiration?

  • It is a characteristic of C4 -plants

  • It is a characteristic of C3 -plants

  • It occurs in chloroplasts

  • It occurs in daytime only


252.

Stomata of CAM plants

  • open during the night and close during the day

  • never open

  • are always open

  • open during the day and close at night


253.

Boron in green plants assists in

  • photosynthesis

  • sugar transport

  • activation of enzymes

  • acting as enzyme cofactor


254.

Who proved that oxygen evolved in photosynthesis comes from water?

  • Mayer

  • Calvin

  • Ruben, Hassid and Kamen

  • Blackman


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255.

Stomata open or close due to the ion

  • Ca2+

  • Na+

  • K+

  • Cu+


256.

The specific character of C4  plants is

  • bulliform cells

  • Kranz anatomy

  • parallel venation

  • isobilateral leaf


257.

In CAM plants, CO2 acceptor is

  • RuBP

  • PEP

  • OAA

  • PGA


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258.

Law of limiting factor was given by

  • Leibig

  • Blackman

  • Calvin

  • Arnon


B.

Blackman

Law of minimum was given by Liebig. It states that when a process, such as growth, is governed by a number of separate factors, the rate of the process is limited by pace of slowest factor.

Blackman' (1905) extended the law of minimum to formulate the law of limiting factors which in his own words is when a process is conditioned as to its rapidity by a
number of separate factors, the rate of the process is limited by the pace of slowest factor.

Calvin (1954) (Nobel Prize winner) traced the path of carbon in photosynthesis.

Amon (1960) demonstrated cychic and non-cyclic photophosphorylation.


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259.

Which one of the following contain agranal chloroplasts?

  • C3 plants

  • Succulants

  • C4 plants

  • Hydrophytes


260.

For synthesis of one hexose sugar, how many times Calvin cycle is turned ?

  • 12

  • 2

  • 6

  • 3


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