by 
Anonymous
ANSWERS: 9
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Are you talking about DNA samples collected from blood samples that have been in the sun? If so, the most part is that it would dry it up and make the samples harder to collect due to lack of substance. Think about the OJ Simpson case when they tried to collect the DNA samples of blood that were splattered all over the sidwalk and front entry way of the house. Due to being in the sun and outside or on the car and in the sun, they had dried up so much that they were hard to collect.
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DNA is a protein and we all know that high temperature denatures protein.Therefore,when DNA is exposed to sunlight,it losses its potency as a genetic material
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DNA in living cells can be mutated by the ultra violet component of sunlight. This can be the cause of skin cancer. By the way, your first answer says DNA is a protein. It is not.
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DNA is known to denature in sunlight. Polymerases are also effected DNA polymerase is important to the proper replication of DNA and can also be used to repair and "check" for errors made during the replication process. It has been theorized that the longer you stay in the sun the more your DNA mutates. Also the polymerases have a difficult time keeping up with all of the repairs to the damaged DNA. This is what may cause melanomas (skin cancer).
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DNA is basically found in the center of cells. When sunlight passes through cells, UV rays in sunlight react with the substance of the cell around the DNA (the cytoplasm), and creates these super reactive molecules called free radicals. These free radicals bump into the DNA and can cause them to mutate. Sunlight can cause direct mutation of DNA as well, without free radicals. As a result of this, proteins synthesised from the mutated DNA will be slightly different to the way they were before =)
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UV light causes thymine dimmers to form in the DNA which is not good because than DNA is not mobile and flexible and loses its structure.
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heavy sunlight can damage the DNA.. because the DNA is the brain of the cells or the center of the cell... If the DNA got damage that's why they have cancer on the skin or part of DNA has been damaged as we know that the DNA is the one who command the cells to multiply... a damage DNA cannot control making or multiplying damage cells too,... too much damage cells in our body is not good it can cause cancer...
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The Sunlight is a mixture of several "electromagnetic waves" the light ,UV and heat we care about the UV ,the ozone lager observes the most of the UV "The Short UV's" but sell the long UV's the long UV's have a low affection for the DNA spatially when you have a dark skin "not like me " you are safe but the with skin can be effected by the UV .
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It makes it easier to see. Having said that... sunlight is a form of electro-magnetic radiation (and by no means the only one). And electro-magnetic radiation affects many of the chemical processes that assist in the replication of DNA. So while there is no affect on DNA itself, sunlight will cause minor "glitches" while DNA is making "copies" of itself. Hope this helps.
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