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Question
Mutations involving a single base substitution are induced by
Mutations involving a single base substitution are induced by
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Solution
The correct option is D X-rays
X-rays are ionizing radiations that can penetrate deep in cell and cause chromosomal aberrations by introducing chromosomal breaks, alteration of nitrogenous bases, or by initiating the chain of chemical reactions. Infrared radiations are non-ionizing radiations that do not carry enough energy to penetrate the genetic material. UV absorption induces dimerization of thymine in DNA. These dimers disrupt the hydrogen bonding between bases by forming bumps in the DNA and on the complementary strands. The high-frequency sound waves beyond the range of human hearing are ultrasonic vibrations. Ultrasonic waves cause cavitation which is the formation of a partial vacuum in a liquid but does not affect the genetic material. Thus, the correct answer is option D.
X-rays are ionizing radiations that can penetrate deep in cell and cause chromosomal aberrations by introducing chromosomal breaks, alteration of nitrogenous bases, or by initiating the chain of chemical reactions. Infrared radiations are non-ionizing radiations that do not carry enough energy to penetrate the genetic material. UV absorption induces dimerization of thymine in DNA. These dimers disrupt the hydrogen bonding between bases by forming bumps in the DNA and on the complementary strands. The high-frequency sound waves beyond the range of human hearing are ultrasonic vibrations. Ultrasonic waves cause cavitation which is the formation of a partial vacuum in a liquid but does not affect the genetic material. Thus, the correct answer is option D.
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