UV rays are very harmful to living organisms because

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

they inhibit the synthesis of vitamin D

they cause DNA damage

they cannot be absorbed by ozone

they catalyse the formation of O₃ from O₂

answer is B.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

UV rays are highly injurious to living organisms since DNA and proteins of living organisms preferentially absorb UV rays, and its high energy breaks the chemical bonds within these molecules. UV rays damages DNA and mutation may occur. It causes ageing of skin, damage to skin cells and various types of skin cancers.

UV rays help in the synthesis of vitamin D from 7-dehydrocholesterol in our skin.

Ozone in the stratosphere acts as a shield absorbing ultraviolet radiation from the sun.

UV rays cause release of Cl from CFCs leading to the degradation of ozone.

Watch 3-min video & get full concept clarity