Multiple Choice
If DNA ligase was nonfunctional, what would be a likely consequence?
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17. Mutation, Repair, and Recombination
DNA Repair
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
DNA, the genetic material of living organisms, is damaged by light in the form of which of the following types of radiation?
A
Microwave radiation
B
Ultraviolet (UV) radiation
C
Infrared (IR) radiation
D
Gamma radiation
Verified step by step guidance1
Understand that DNA damage by light typically involves electromagnetic radiation that has enough energy to cause molecular changes.
Recall the types of electromagnetic radiation and their energy levels: microwaves and infrared have lower energy, ultraviolet (UV) has moderate energy, and gamma rays have very high energy.
Recognize that UV radiation has sufficient energy to cause specific types of DNA damage, such as the formation of thymine dimers, which disrupt normal base pairing.
Note that microwaves and infrared radiation generally cause heating effects but do not directly damage DNA at the molecular level.
Gamma radiation, while capable of damaging DNA, is not considered 'light' in the visible or near-visible spectrum; it is a form of ionizing radiation, distinct from UV light.
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