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9 Cards in this Set
- Front
- Back
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What does it mean that a water molecule is polar?
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A water molecule is polar b/c there is some positive charge at one end of the molecule and some neg charge at the other.
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What is pH? What do high and low pHs mean? What pH is neutral?
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pH = relative amt of H+ ions
high pH = basic neutral pH = 7 low pH = acidic |
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What general function do enzymes accomplish?
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Enzymes cause the breakdown of nutrients into smaller molecules that are combined by other enzymes into the complex materials required by the cell. Enzymes also derive energy from chemicals for use by the growing cell.
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What are workers of a cell?
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Enzymes, which are polymers of amino acids
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Would an organism that contains one million base pairs of DNA be more likely to have one thousand or ten thousand genes?
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The org would be more likely to have one thousand genes, because an average gene is about one thousand base pairs in length.
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How many bases of RNA are required to code for one amino acid?
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Three RNA bases are required for one amino acid
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How do DNA and RNA differ?
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DNA is double stranded, has the sugar deoxyribose, and the nucleotide T (thymidine); RNA is single stranded, has ribose, and has U (uridine) in place of T
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If a bact cell has 35 % guanine, how much cytosine would it have? How much adenine? Why is this so?
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35% C, 35 % G. C=G. It has 15 % adenine because the remaining 30 % of nucleotides must have equal amounts of A and T.
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What is the main function of lipids in the cell membrane?
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Lipids are small macromolecules that span cell membranes. They provide a nonpolar boundary to keep cellular contents in and unwanted materials out.
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