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Is a species that lacks DNA repair mechanisms likely to have more or fewer variations between individuals than a species that possesses repair mechanisms?
More, because more spontaneous mutations will go uncorrected.
What is the result if DNA repair mechanisms fail?
A mutation occurs, and cancer can form since mutations are occurring quicker than repair is able to take place. There could also be a defective enzyme
Is DNA replication the same as DNA repair?
no replication makes a whole new strand of identical DNA while repair just replaces or cuts out mutations in the DNA strand
Mutations occur because of what?
Mutations occur because there are many things that can cause random changes in the nucleotides of the DNA or RNA: e.g. radioactivity, UV light, free radicals, accidental copying errors. Eukaryotic organisms have a variety of repair mechanisms to correct these random errors, but even those repair mechanisms are not perfect and sometimes mutate a mutation accidentally instead of repairing it. Nothing is perfect.
How can mutagens cause genetic mutations in spite of your body DNA repair enzymes?
Mutagens cause a change in DNA and by this way they can produce mutant DNA repair enzymes.
Is a species that lacks DNA repair mechanisms likely to have more or fewer variations between individuals than a species that possesses repair mechanisms?
More, because more spontaneous mutations will go uncorrected.
How does the DNA stay the same?
It doesn't. But 1) the body (cells) have repair mechanisms. And 2) errors lead to a lack of decedents.
What is the result if DNA repair mechanisms fail?
A mutation occurs, and cancer can form since mutations are occurring quicker than repair is able to take place. There could also be a defective enzyme
What is the relation between aging process and DNA?
Your DNA is constantly being copied when cells divide. If an error occurs, your body has several repair mechanisms to fix it. As you grow older, these repair mechanisms become less efficient at correcting errors, and your DNA copies get more and more errors in them, contributing to the aging process. A good example is to think of making a copy of a 1-pg report. Then making a copy from that copy, and then another from that copy and so on. As time goes on, the copies get darker and harder to distinguish (simply as a bi-product of the copying process). This is the same as your DNA - constantly making DNA copies from DNA copies results in more and more errors and your body becomes less able to repair them.
Why do viruses have high mutation rate?
Unprotected DNA subject to environmental insults, such as UV light, all the time and no repair mechanisms when the DNA us replicated in host cells. Plus RNA viruses have a much less stable molecule to use as a genetic receptacle than DNA viruses.
Is DNA replication the same as DNA repair?
no replication makes a whole new strand of identical DNA while repair just replaces or cuts out mutations in the DNA strand
All plants and animals have mechanisms that what?
All plants and animals have mechanisms that repair their bodies and reproduce.
How does cancer begin at the cellular level and how does a healthy immune system work to prevent it?
In cellular level Cancer starts with a molecular mutation that effects the DNA of the cell. When this mutation occurs there are some control mechanisms to repair the effected part of the DNA but sometimes the control mechanisms may not work properly and the control on the dmged cell vanish and the cell starts to proliferate repeatedly. usually normal mutations in the DNA are fixed and if it is not fixable the cell goes down a process called apoptosis and that refers the cell is suiciding but some mutations may occur on some genes which are responsible of the activity of tumor supressing and when this kind of genes are effected the seed of cancer is become sown.
Mutations occur because of what?
Mutations occur because there are many things that can cause random changes in the nucleotides of the DNA or RNA: e.g. radioactivity, UV light, free radicals, accidental copying errors. Eukaryotic organisms have a variety of repair mechanisms to correct these random errors, but even those repair mechanisms are not perfect and sometimes mutate a mutation accidentally instead of repairing it. Nothing is perfect.
When the repair mechanism for DNA fails the result is?
Failure of the DNA repair mechanism can result in cancer, mutation or a defective enzyme.
How can mutations cause genetic mutations in spite of your body's DNA repair enzymes?
Mutagens cause a change in DNA and by this way they can produce mutant DNA repair enzymes.
How can mutagens cause genetic mutations in spite of your body DNA repair enzymes?
Mutagens cause a change in DNA and by this way they can produce mutant DNA repair enzymes.
