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What is the effect of excessive exposure to ultraviolet light at the beach or in a tanning salon on the DNA of your skin cells?

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter16: Human Genetics And The Human Genome

Section16.6: Human Genetics, Society, And Ethics

Problem 3C

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What causes the change in the ability of DNA to absorb UV light when it is denatured? options: In denatured DNA, DNA double helix is disrupted, which causes the exposure of the deoxyribose and thus increases their absorbance of UV light In denatured DNA, DNA double helix is disrupted, which causes the exposure of the phosphate groups and thus increases their absorbance of UV light. In denatured DNA, DNA double helix is disrupted, which causes the exposure of the bases and thus increases their absorbance of UV light. all of the above are correct
Discuss the following statement: “the DNA repair enzymes that fix deamination and depurination damage must preferentially recognize such damage on newly synthesized DNA strands.”
When UV light strikes DNA at a location where two thymines are side by side, what happens?
What happens if DNA polymerase fails to correct an error?
What is/are the purpose of DNA extraction?
What are anonymous DNA polymorphisms?
What are the three main steps for repairing the DNA damages such as the deamination of cytosine nucleotide and the thymine dimer?
Adjacent pyrimidine bases in DNA form dimers with high efficiency after exposure to UV light. If these dimers are not repaired, skin cancers can result. Melanin is a natural sunscreen produced by melanocytes, a type of skin cell, when the skin is exposed to sunlight. Individuals who spend long periods developing a tan eventually acquire a thick and highly wrinkled skin. Such individuals are also at high risk for skin cancer. Can you explain, in general terms, why these phenomena are related?
What is the enzyme responsible for methylating DNA? How does a drug like doxorubicin affect DNA methylation?
Which part of each zinc finger is involved in contacting the DNA, and what part of the DNA is contacted?
How important and useful to the cell is the ability of the DNA to assume various forms? Why are these various forms necessary?
Contrast the various types of DNA repair mechanisms known to counteract the effects of UV radiation. What is the role of visible light in repairing UV-induced mutations?