BIO130H1 : chpater 1 notes for book

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BIO130H1 Full Course Notes
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22:42 template polymerization- way in which info is copied. two strands of dna are pulled apart, and each serves as a template for synthesis of a new complementary strand. Anticodon on trna helps recognize codon on mrna. In all cells, the expression of individual genes is regulated independently of one another. Therefore, the cell adjusts the rate of transcription and translation of different genes independently. Life requires free energy: energy in a physical system that can be converted to do work. Universal feature of all cells: all cells require atp for the synthesis of dna and. Atp is also the carrier of free energy and helps to drive other chemical reactions. Another universal feature: cells are enclosed by a plasma membrane. It is a selective barrier that enables the cell to concentrate all the nutrients it gathers from its environment.

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