The wavelength of ultraviolet radiations which is most powerful and causes damage to the DNA is _____.
-
A.
UV-A
-
B.
UV-C
-
C.
UV-D
-
D.
UV-B
Correct Answer:
D. UV-B
Explanation:
UV-C is the most energetic and powerful form of ultraviolet radiation, with wavelengths ranging from 100 to 280 nm. It has the highest capacity for DNA damage because its wavelength aligns with the maximum absorption of DNA at 260 nm, causing severe structural changes and mutations. However, most solar UV-C is absorbed by the Earth's ozone layer and does not reach the surface. In contrast, while UV-B and UV-A do reach the Earth and cause significant biological damage like skin cancer and cataracts, they are less energetic than UV-C. Therefore, the specific wavelength range that is inherently most powerful and damaging to DNA is UV-C.
Click below to open Discussion & Feedback
0 Issues
Please
login to comment or Report Issues.