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  2. Long interspersed nuclear element - Wikipedia

    en.wikipedia.org/wiki/Long_interspersed_nuclear...

    ORF1 proteins form trimers, exhibiting RNA binding and nucleic acid chaperone activity. Long interspersed nuclear elements (LINEs) [1] (also known as long interspersed nucleotide elements [2] or long interspersed elements [3]) are a group of non-LTR (long terminal repeat) retrotransposons that are widespread in the genome of many eukaryotes.

  3. AP Biology - Wikipedia

    en.wikipedia.org/wiki/AP_Biology

    Advanced Placement (AP) Biology (also known as AP Bio) is an Advanced Placement biology course and exam offered by the College Board in the United States. For the 2012–2013 school year, the College Board unveiled a new curriculum with a greater focus on "scientific practices".

  4. Form classification - Wikipedia

    en.wikipedia.org/wiki/Form_classification

    Form classification, generally restricted to palaeontology, reflects uncertainty; the goal of science is to move "form taxa" to biological taxa whose affinity is known. [ 1 ] Form taxonomy is restricted to fossils that preserve too few characters for a conclusive taxonomic definition or assessment of their biological affinity, but whose study ...

  5. Long terminal repeat - Wikipedia

    en.wikipedia.org/wiki/Long_terminal_repeat

    A long terminal repeat (LTR) is a pair of identical sequences of DNA, several hundred base pairs long, which occur in eukaryotic genomes on either end of a series of genes or pseudogenes that form a retrotransposon or an endogenous retrovirus or a retroviral provirus. All retroviral genomes are flanked by LTRs, while there are some ...

  6. List of unsolved problems in biology - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Developmental psychobiology posed this question since the lack of knowledge about the precise coordination of all cells, even those not related anatomically, in space and time during the embryonic period does not allow us to understand what forces at the cellular level coordinate four very general classes of tissue deformation, namely: tissue ...

  7. Outline of biology - Wikipedia

    en.wikipedia.org/wiki/Outline_of_biology

    Molecular biology – study of biology and biological functions at the molecular level, with some cross over from biochemistry. Structural biology – a branch of molecular biology, biochemistry, and biophysics concerned with the molecular structure of biological macromolecules. Health sciences and human biologybiology of humans.

  8. The cast of “Friends” is well known for being besties, but that developed over time. During an appearance on Dax Shepard’s “Armchair Expert” podcast, “Friends” star Lisa Kudrow ...

  9. TET enzymes - Wikipedia

    en.wikipedia.org/wiki/TET_enzymes

    5-Methylcytosine (see first Figure) is a methylated form of the DNA base cytosine (C) that often regulates gene transcription and has several other functions in the genome. [1] DNA methylation is the addition of a methyl group to the DNA that happens at cytosine. The image shows a cytosine single ring base and a methyl group added on to the 5 ...

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