Question 9 UV radiation causes the formation of [ Select ] in a DNA strand, which prevents that strand from forming the [ Select ] required for complementary base pairing, which means that the strand cannot undergo transcription or [ Select ]. Question 10 Thinking about Lab 13: Control of Microbes by Ultraviolet (UV) Radiation, list a factor which might affect an organism's susceptibility to UV light. cytoskeleton present DNA repair enzaymes present pigment present fimbriae present
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One of the biologically harmful effects of ultraviolet (UV) light is its action on DNA. UV light results in what type of alteration in DNA? covalent formation of purine dimers involving adjacent purines on opposing DNA strands covalent formation of pyrimidine dimers involving adjacent pyrimidines in a DNA strand covalent formation of links between purine and pyrimidine base pairs covalent formation of links between deoxyriboses on opposing DNA strands covalent formation of pyrimidine dimers involving adjacent pyrimidines on opposing DNA strands
Dominador T.
Exposing bacteria to UV light results in the following EXCEPT: - may cause deletions and insertions in their DNA - forms thymine dimers in their DNA - disrupts/stops translation in the bacteria - may cause base substitutions in their DNA - can stall or stop DNA replication in the bacteria - may cause pro-phage to leave host cell's DNA
Marlyn J.
1. What type of radiation in sunlight causes damage to DNA? Beta radiation UV radiation (correct) Gamma radiation Alpha radiation 2. How does UV radiation damage DNA? It causes frameshift mutations. It causes missense mutations. It causes nonsense mutations that end translation prematurely. It causes covalent bond formation between adjacent thymine bases. (correct) 3. True or false: The cell can replicate and transcribe DNA with thymine dimers. True (INCORRECT) False 4. Photolyase repairs thymine dimers in a _____ dependent manner. heat (INCORRECT) dark light acid 5. Excision repair, which is used to correct thymine dimers, requires ______. high temperatures low pH light None of the these choices are correct. (correct)
Adi S.
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