BIO130H1 : BIO130 Section One Guide (2)
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BIO130H1 Full Course Notes
Verified Note
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Document Summary
Chapter 2 cell chemistry and biosynethsis (pg. Water is the most abundant substance in cells. Water accounts for about 70% of a cell"s weight. Dna, rna, sugars, and most proteins are all hydrophilic. Uncharged molecules of long hydrocarbon tails that are hydrophobic can be exploited to construct membranes. Four types of noncovalent attractions help bring molecules together in cells. In aqueous solution, covalent bonds are 10-100x stronger than other attractions between atoms. There are three three noncovalent chemical bonds that are much weaker: ionic (electrostatic attraction) forms permanent dipoles. H bonded water network, where they would otherwise interfere with the highly favourable interactions between water molecules bringing any two nonpolar surfaces together reduces their contact with water central to the proper folding of protein molecules. A cell is formed from carbon compounds carbon is outstanding among all the elements in its ability to form large molecules (silicon is a poor second)
