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    Assorted Organic, Bio-Organic Chemistry Problems

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    1) Label each pair of stereoisomers below as:
    a) enantiomers b) diastereomers c) identical

    2) Convert the following Fischer projections into a tetrahedral representation, and assign R or S stereochemistry to each.

    3) The reaction below is an example of:

    a. nucleophilic addition
    b. electrophilic addition
    c. nucleophilic acyl substitution
    d. electrophilic subsitition

    4) Refer to the data below to answer the following questions:

    Amino Acid Isoelectric point
    Arginine 10.76
    Glutamic Acid 3.22
    Tryptophan 5.89

    The most basic amino acid is ____
    The most acidic amino acid is ___

    5) MATCH a structure from the list below to each of the following terms. Place the letter of the structure in the blank to the left of the term which it describes.

    ___ an octapeptide
    ___ an amino acid in its zwitterionic form
    ___ a polypeptide which gives four fragments on treatment with chymotrypsin
    ___ a carboxyl-protected amino acid
    ___ a peptide coupling reagent
    ___ small organic molecules which act as coenzymes

    6) MATCH each of the following terms to a structure from the list below. There is only one correct structure for each term, and structures may be used more than once. Place the letter of the structure in the blank to the left of the corresponding term.

    _________ a phosphoglyceride
    _________ monoterpene precursor
    _________ a triglyceride
    _________ a sphingolipid
    _________ a soap
    _________ a steroid
    _________ a sesquiterpene

    8) Choose a structure from the list provided below that best fits each of the following descriptions. Place the letter of the structure in the blank to the left of the description. There is only one correct answer for each question.

    a. starch
    b. cellulose
    c.

    d.

    e.

    f. sucrose

    ___ a monosaccharide that give a negative benedict's test
    ___ -D-glucopyranose in a Haworth projection
    ___ a disaccharide

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    https://brainmass.com/chemistry/stereochemistry-bonding-and-formation/assorted-organic-bio-organic-chemistry-problems-161058

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