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  2. DNA - Wikipedia

    en.wikipedia.org/wiki/DNA

    DNA exists in many possible conformations that include A-DNA, B-DNA, and Z-DNA forms, although only B-DNA and Z-DNA have been directly observed in functional organisms. [14] The conformation that DNA adopts depends on the hydration level, DNA sequence, the amount and direction of supercoiling, chemical modifications of the bases, the type and ...

  3. Introduction to genetics - Wikipedia

    en.wikipedia.org/wiki/Introduction_to_genetics

    DNA can be copied very easily and accurately because each piece of DNA can direct the assembly of a new copy of its information. This is because DNA is made of two strands that pair together like the two sides of a zipper. The nucleotides are in the center, like the teeth in the zipper, and pair up to hold the two strands together.

  4. BBC Learning English - Wikipedia

    en.wikipedia.org/wiki/BBC_Learning_English

    BBC Learning English is a department of the BBC World Service devoted to English language teaching. The service provides free resources and activities for teachers and students, primarily through its website. It also produces radio programmes which air on some of the BBC World Service's language services and partner stations.

  5. Extramural English - Wikipedia

    en.wikipedia.org/wiki/Extramural_English

    To bridge learning English outside and inside the classroom some teachers use a 30-day challenge with a focus on EE activities. [14] This way of learning a language is not particular to English but can involve any target language. The overarching term referring to learning any target language is Extramural L n. [5] [15] [16]

  6. ABCmouse.com Early Learning Academy - Wikipedia

    en.wikipedia.org/wiki/ABCmouse.com_Early...

    ABCmouse.com is a digital education program for children ages 2–8, created by the edtech company Age of Learning, Inc. [2] [3] The program offers educational games, videos, puzzles, printables, and a library of regular and “read-aloud” children’s books, covering subjects including reading and language arts, math, science, health, social studies, music, and art.

  7. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    The form comes with two worksheets, one to calculate exemptions, and another to calculate the effects of other income (second job, spouse's job). The bottom number in each worksheet is used to fill out two if the lines in the main W4 form. The main form is filed with the employer, and the worksheets are discarded or held by the employee.

  8. Human genome - Wikipedia

    en.wikipedia.org/wiki/Human_genome

    Epigenetic markers strengthen and weaken transcription of certain genes but do not affect the actual sequence of DNA nucleotides. DNA methylation is a major form of epigenetic control over gene expression and one of the most highly studied topics in epigenetics. During development, the human DNA methylation profile experiences dramatic changes.

  9. Wikipedia:Wikipedia for Schools - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Wikipedia_for...

    Wikipedia for Schools is a selection of articles from Wikipedia produced by international children's charity SOS Children and most recently updated in 2013. It was originally produced as a learning resource for schools in countries where Internet access is limited, though it has also enjoyed significant success in the developed world.

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