Question

Consider the following statements:
Statement-I: When compared to UV-A rays, UV-B and UV-C rays are more harmful to organisms
Statement-II: Oriented locomotor movement of an organism towards or away from the direction of light is called phototaxis

• A. Both statements I and II are true
• B. Both statements I and II are false
• C. Statement I is true, but statement II is false
• D. Statement I is false, but statement II is true

Hint:

UV rays: UV-C>UV-B>UV-A in harmfulness. Phototaxis: positive = toward light, negative = away from light. Always relate wavelength to energy and biological effect.

Answer 1

The Correct Option is A

UV-B and UV-C rays are more energetic than UV-A and can damage DNA and proteins. Phototaxis is movement toward (positive) or away (negative) from light. Both statements are accurate.