Microbiology
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What does it mean that a water molecule is polar? | there is positive charge at one end of the molecule and negative charge at the other.
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| What is pH? What do high and low pHs mean? What pH is neutral? | pH is a measurement of the acid or alkaline properties of a molecule--high pHs (above8) are basic and low pHs (below6) are acidic--neutral is pH 7.
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| What general function do enzymes accomplish? | cause the breakdown of nutrients into smaller molecules--combined with other enzymes--complex materials required by the cell--derive energy from chemicals for use by the growing cell.
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| What are the workers of a cell? | enzymes--which are polymers of amino acids
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| Would an organism that contains 1 million base pairs of DNA be more likely to have 1 thousand or 10 thousand genes? | 1,000--an average gene is about one thousand base pairs long.
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| How many bases of RNA are required to code for one amino acid? | 3 RNA bases for 1 amino acid
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| How do DNA and RNA differ? | DNA--double stranded, has the sugar deoxyribose and the nucleotide T(thymidine)--RNA--single stranded--ribose, and U (uridine) in place of T
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| If a bacterial cell has 35% guanine, how much cytosine would it have? How much adenine? Why is this so? | 35% cytosine--C always =s G in DNA--15% adenine because remaining 30% of nucleotides must have = A and T.
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| What is the main function of lipids in the cell membrane? | small macromolecules that span cell membranes--provide nonpolar boundary to keep cellular contents in and unwanted materials out.
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Created by:
heatherlvn
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