Chemical Principles IX
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| Why is carbon so important in the chemistry of life? | The condition of outer electron shell, there are 4 electrons and 4 vacancies. This allows carbon to react with many other atoms & with other carbon atoms to form a variety of chains & rings. These are the basis of many organic compounds in living cells
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| Why are lipids important components of living cells? | They are a major component of membranes in both structure and function. They serve as a boundary between the cell and the environment. Lipids function in energy storage and are also a component of some bacterial cell walls.
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| Explain the role of pH buffers in the growth of bacterial cultures in laboratory media. | Waste products excreted by bacteria alter the pH of the medium. pH buffers such as K+phos, monobasic- are added to media to prevent drastic changes in pH. w/o this the media would become acidic enough to inactivate bacterial enzymes & kill the organism.
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| Why is ATP indispensable to cells? | It is the principal energy carrying molecule of the cell. It stores chemical energy released by some reactions & releases energy 4 reactions that require energy. ATP releases lge amts of usable energy when it loses its terminal phos grp. ATP~ADP+P+energy
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