A: Carotenoids protect plants from excessive | vedclass

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Question

(B) The Assertion is correct: Carotenoids act as accessory pigments that protect chlorophyll molecules from photooxidation by absorbing excess light e

Vedclass · Accepted Answer

Assertion and Reason both are correct but Reason is not the correct explanation of Assertion.

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(B) The Assertion is correct: Carotenoids act as accessory pigments that protect chlorophyll molecules from photooxidation by absorbing excess light energy and dissipating it as heat.The Reason is also correct: Carotenoids absorb light in the blue-violet region and transfer this energy to chlorophyll $a$,thereby expanding the range of wavelengths that can be used for photosynthesis.Since both statements are scientifically accurate and describe distinct functional roles of carotenoids,the Reason does not directly explain the mechanism of protection mentioned in the Assertion. Therefore,both are correct but the Reason is not the correct explanation of the Assertion.

Column-$I$	Column-$II$
$a.$ Yellow to yellow-orange	$1.$ Chlorophyll-$a$
$b.$ Green	$2.$ Xanthophyll
$c.$ Yellow	$3.$ Carotenoids

$A$: Carotenoids protect plants from excessive heat and prevent photooxidation of chlorophyll.
$R$: Carotenoids enable a wider range of wavelengths of incoming light to be utilized for photosynthesis.

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In a chloroplast,chlorophyll is present in the ............

Which of the following is the correct order of effectiveness for photosynthesis?

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Match the following columns:
Column-$I$ Column-$II$
$a.$ Yellow to yellow-orange $1.$ Chlorophyll-$a$
$b.$ Green $2.$ Xanthophyll
$c.$ Yellow $3.$ Carotenoids

The universal photosynthetic pigment is ......... .

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$A$: Carotenoids protect plants from excessive heat and prevent photooxidation of chlorophyll.$R$: Carotenoids enable a wider range of wavelengths of incoming light to be utilized for photosynthesis.