The red, orange and yellow colours of leaf is due to :

examrobotsa's picture

Submitted by examrobotsa on

Q: 92 (SSC/NA)
The red, orange and yellow colours of leaf is due to :

question_subject: 

Science

question_exam: 

SSC

stats: 

0,10,11,3,3,5,10

keywords: 

{'yellow colours': [1, 0, 0, 0], 'leaf': [13, 0, 2, 4], 'carotenoid': [4, 0, 0, 0], 'lignins': [1, 0, 0, 0], 'aldehydes': [1, 0, 0, 1], 'tannis': [1, 0, 0, 0]}

The correct answer is option 4, Carotenoids. Carotenoids are pigments that give the red, orange, and yellow colors to the leaves of plants. They play a crucial role in photosynthesis as they absorb light energy and transfer it to chlorophyll to be used in the process. Aldehydes, option 1, are not responsible for the color of leaves. Tannins, option 2, are a class of compounds found in plants, but they do not contribute to the color of leaves. Lignins, option 3, provide structural support to plants and are not involved in leaf coloration. Therefore, option 4, Carotenoids, is the correct answer.