A1.2 Nucleic Acids

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6 Terms

1
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How structure of DNA dictates directionality

Pentose sugar linked to phosphate in another nucleotide, so everything in polymer faces the same way.

2
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Directionality of replication

Both strands are used as templates

5’ to 3’ assembly of new strand in opposite direction of the other strand being assembled

3
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Directionality of transcription

Only one strand is needed as RNA template

RNA production can move in the same direction as transcription

4
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directionality of translation

Ribosome that carries out translation moves along RNA molecule towards 3’ end

5
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Structure of nucleosome

core of each are 8 histone proteins

DNA is wound around proteins twice

Additional histone protein reinforces binding of DNA, packaging of chromosomes when a nucleus is prepping to divide.

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