Which of the following energy sources from the electromagnetic spectrum are likely to induce mutations? Mark all the answers that apply O Visible light O Ultraviolet light O cosmic rays gamma rays 9 X-rays
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- Which of the following statements best describes the effect of mutations in DNA? A Mutations result in changes that can be positive, be negative, or have no consequences B Mutations result in changes that always have negative consequences C Mutations result in changes that cannot be detected unless it is revealed by genetic screening D Mutations result in changes that have no consequencesWhich of the following is not a factor that increases mutations? A. replication errors B. ionizing radiation C. UV radiation D. repair enzymesHow do we know that certain chemicals and wavelengths of radiation induce mutations in DNA?
- Which of the following can only arise as a spontaneous mutation? Group of answer choices Gamma rays penetrate tissue and damage DNA Base analogs cause DNA to pair with the wrong base. Reactive forms of oxygen damage DNA In replication, thymine mispairs with guanine Nitrous acid deaminates cytosineWhy Spontaneous Mutations Occurat a Very Low Rate?Which of the following can be said of the genetic effects of gamma rays and cosmic rays? (mark all the answers that apply) They can repair thymine dimers They can cleave one or both of the DNA strands. They can fuse DNA strands together. They cause free radicals to form, which can damage DNA. They penetrate deeply into tissues.
- A mutation is most often cause by which of the following factors? a) Sunlight b) Smoking c) Random Copy error d) RadiationWhich of the following types of mutations would be predicted to harm an organism? explain your answers. A. insertion of a single nucleotide near the end of the coding sequence.B. removal of a single nucleotide near the beginning of the coding sequence. C. Deletion of three consecutive nucleotides in the middle of the coding sequence. D. Deletion of four consecutive nucleotides in the middle of the coding sequence. E. substitution of one nucleotide for another in the middle of the coding sequence.Although it is well known that X-rays cause mutations, they are routinely used to diagnose medical problems, including potential tumors, broken bones, and dental cavities. So why do we still use X-rays in medicine anyway? What precautions need to be taken?