A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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A methyl group can be added to a cytosine residue, usually one that neighbors a guanine (known as a CpG - cytosine-phosphate-guanine - site). This can affect chromatin and histone structures, as well …
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sites in proteins or on DNA where other proteins or DNA can bind. Binding sites are usually conserved.
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Embryos of chickens (*Gallus gallus domesticus*) are often used in genetic experimentation and testing. To a lesser extent, adult chickens can be used as a laboratory animal.
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The production and emission of light by a living organism.
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Nerves that emerge directly from the brain.
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Acquired ImmunoDeficiency Syndrome (AIDS) is a disease caused by the Human Immunodeficiency Virus (HIV), that results in loss of CD4+ T-Lymphocyte thereby leading to a loss of immune function.
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The science of humanity. In a biological sense anthropology focusses on humans and non-human primates, and their evolutionary, biological, and demographic attributes.
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The chief enzyme involved in fatty acid biosynthesis. They include cerulenin, a natural products produced by the fungi Sarocladium oryzae.
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Journal where experts from the field (peers) of a submitted article review the article prior to publication. They decide what happens to the article, if it needs to be supplemented with further experi…
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Questions pertaining to periodic life cycle events, and how these are affected by the external environment, climatic variation and weather fluctiations.
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defined by http://dictionary.reference.com/browse/poison as: a substance with an inherent property that tends to destroy life or impair health.
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Questions pertaining to the synthesis of DNA from RNA.
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A post-transcriptional mechanism of gene-regulation/silencing mediated by small RNAs (siRNA)
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The locations at which two bones make contact. They may be movable or unmovable.
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Drugs that bind to the opioid receptors (mu, delta & kappa).
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