NEET UG BIOLOGY MCQ: PHOTOSYNTHESIS IN HIGHER PLANTS

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Assertion : Under conditions of high light
intensity and limited

C{O_2}

supply,
photorespiration has a useful role in protecting
the plants from photo-oxidative damage.

Reason : If enough

C{O_2}

is not available to utilize
light energy for carboxylation to proceed, the
excess energy may not cause damage to plants.

View answer and explanation

Correct option: C

If Assertion is true but Reason is false

Option C (If Assertion is true but Reason is false) is correct because photorespiration does protect plants under high light and low CO2, but the excess energy *does* cause damage if not utilized.

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Energy required for ATP synthesis in PS – II comes from? Correct sequence of rate of photosynthesis in different light is The

{C_4}

plants are photosynthetically more efficient than

{C_3}

plants because: If a chemical process is affected by more than one factors then its rate will be determined by Identify the incorrect statements among the following

I. When only PS I is functional, cyclic flow of electrons is not possible

II. The breakdown of the gradient provides enough to make the enzyme synthesis

III. The NADP reductase enzyme is located of the thylakoid membrane

IV. Proton gradient increases due to

\mathrm{PC}

and Cyt

f

. Law of limiting factors was given by