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Exercise 2 Functional Groups, Organic Molecules, Buffers, and Dilutions

Elements. There are 92 naturally occurring elements, six of which comprise 99% of the weight of most cells. These six elements, which are most abundant in the biologically important molecules, are:Carbon = C Hydrogen = H Nitrogen = N Oxygen = O Phosphorus =

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Exercise 2 Functional Groups, Organic Molecules, Buffers, and Dilutions

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    1. Exercise 2 Functional Groups, Organic Molecules, Buffers, and Dilutions

    2. Elements There are 92 naturally occurring elements, six of which comprise 99% of the weight of most cells. These six elements, which are most abundant in the biologically important molecules, are: Carbon = C Hydrogen = H Nitrogen = N Oxygen = O Phosphorus = P Sulfur = S

    3. Part A: Functional Groups and Biologically Important Molecules Most biological molecules are held together by covalent bonds (bonds that form when adjacent atoms share electrons). Biological molecules are classified according to their functional groups.

    4. Functional groups Functional groups are clusters of atoms bonded to the carbon backbone of the molecule and are most commonly involved in chemical reactions.

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