Chem Test 3

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Anonymous
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15555
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Chem Test 3
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2010-04-21 16:31:53
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Final Exam Review
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Final Exam Review
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  1. The compound CH3CH3NHCH3 is classified as a

    A) hydrated amine
    B) tertiary amine
    C) quaternary amine
    D) secondary amine
    E) primary amine
    D) secondary amine
    (this multiple choice question has been scrambled)
  2. The compound CH3CH2NH2 is classified as a

    A) primary amine
    B) quaternary amine
    C) secondary amine
    D) hydrated amine
    E) tertiary amine
    A) primary amine
    (this multiple choice question has been scrambled)
  3. Which of the following compounds CANNOT form hydrogen bonds with water?

    a) (CH3CH2)2NH
    b) CH3CH2OH
    c) (CH3CH2)3N
    d) CH3CH2NH2
    e) All of the compounds above are capable of forming hydrogen bonds with water
    e) All of the compounds above are capable of forming hydrogen bonds with water
  4. Name the following compound: CH3-NH-CH3

    a) ethyl amine
    b) dimethyl ether
    c) methanal
    d) 1-methanoate
    e) dimethyl amine
    e) dimethyl amine
  5. In response to allergic reactions or injury to cells, the body increases the production of

    A) diphenhydramine.
    B) antihistamine.
    C) histamine.
    D) dopamine.
    E) epinephrine.
    C) histamine.
    (this multiple choice question has been scrambled)
  6. When acetic acid reacts with ammonia, NH3, the reaction called amidation yields

    A) ammonium acetate
    B) amino acetate
    C) acetamine
    D) acetamide
    E) ethylammonium hydroxide
    D) acetamide
    (this multiple choice question has been scrambled)
  7. In the formation of N-ethylacetamide, the reactant(s) is(are)

    A) diethylamine
    B) acetic acid and ethylamine
    C) ethanol and ethylamine
    D)acetic acid and dimethylamine
    E) acetamide and ethanol
    B) acetic acid and ethylamine
    (this multiple choice question has been scrambled)
  8. What relation does the boiling point of an amine have to a simliar hydrocarbon?

    A) higher
    B) lower
    C) very similar
    A) higher
    (this multiple choice question has been scrambled)
  9. Amines can form _____ bonds with other molecules.

    A) hydrogen
    B) oxygen
    C) triple
    D) metallic
    E) nonpolar
    A) hydrogen
    (this multiple choice question has been scrambled)
  10. In what form are amine-containing drugs often administered?

    A) free base
    B) sodium salt
    C) water solution
    D) oil solution
    E) amine salt
    E) amine salt
    (this multiple choice question has been scrambled)
  11. Which of the following is NOT a function of proteins?

    A) stores the genetic information of a living organism
    B) provide structural components
    C) movement of muscles
    D) transport substances through the bloodstream
    E) catalyze reactions in the cells
    A) stores the genetic information of a living organism
    (this multiple choice question has been scrambled)
  12. Sucrase, the protein that facilitates the hydrolysis of sucrose, would be classified as _____ protein.

    A) structural
    B) transport
    C) hormonal
    D) catalytic
    E) contractile
    D) catalytic
    (this multiple choice question has been scrambled)
  13. The peptide bonds that combine amino acids in a protein are

    A) amide bonds
    B) ether bonds
    C) ester bonds
    D) glycosidic bonds
    E) sulfide bonds
    A) amide bonds
    (this multiple choice question has been scrambled)
  14. The bonds that are important in the secondary structure of a protein are

    A) salt bridges
    B) hydrophobic interactions
    C) disulfide bonds
    D) peptide bonds
    E) hydrogen bonds
    E) hydrogen bonds
    (this multiple choice question has been scrambled)
  15. Which of the following shows all of the tripeptides that can be formed from one molecule each of glycine (Gly), Valine (Val), and leucine (Leu)?

    A) GlyValLeu
    B) GlyValLeu, GlyLeuVal, ValLeuGly, ValGlyLeu, LeuGlyVal, LeuValGly
    C) ValGlyLeu & GlyLeuVal
    D) ValGlyLeu, GlyValLeu, GlyLeuVal, LeuGlyVal
    E) GlyValLeu, GlyLeuVal, LeuGlyVal
    B) GlyValLeu, GlyLeuVal, ValLeuGly, ValGlyLeu, LeuGlyVal, LeuValGly
    (this multiple choice question has been scrambled)
  16. Hemoglobin has a total of _______ protein chains in its quaternary structure.

    A) 4
    B) 1
    C) 5
    D) 2
    E) 3
    A) 4
    (this multiple choice question has been scrambled)
  17. In a typical amino acid zwitterion, the carboxylate end is

    A) neutral
    B) attached to an amine
    C) soluble in a nonpolar solvent
    D) negatively charged
    E) positively charged
    A) neutral
    (this multiple choice question has been scrambled)
  18. What process occurs when heat, acids, bases, and heavy metal ions cause a los of biological function of a protein?

    A) denaturation
    B) esterification
    C) hydrogenation
    D) amidation
    E) saponification
    A) denaturation
    (this multiple choice question has been scrambled)
  19. In digestion, proteins are broken down into amino acids by a(n) ______ reaction.

    A) saponification
    B) hydrolysis
    C) denaturation
    D) reduction
    E) oxidation
    B) hydrolysis
    (this multiple choice question has been scrambled)
  20. Which of the following is NOT true for a competitive inhibitor?

    A) It binds to the enzyme at a site remote from the active site.
    B) It can't be converted to products
    C) It occupies the active site
    D) Increasing the substrate concentration can reverse competitive inhibition
    E) It has a structure similar to the substrate
    A) It binds to the enzyme at a site remote from the active site.
    (this multiple choice question has been scrambled)
  21. A noncompetitive inhibitor

    A) binds at the active site of the enzyme
    B) alters the three-dimensional structure of the enzyme
    C) increases the rate of the enzyme-catalyzed reaction
    D) has a structure similiar to the substrate
    B) alters the three-dimensional structure of the enzyme
    (this multiple choice question has been scrambled)
  22. In any reaction catalyzed by an enzyme, the reaction molecule is called the

    A) cofactor
    B) allostere
    C) coenzyme
    D) isozyme
    E) substrate
    E) substrate
    (this multiple choice question has been scrambled)
  23. When a substance bonds to an enzyme for reaction, its place of binding is the

    A) end pocket
    B) primary pocket
    C) active site
    D) allosteric site
    E) primary site
    C) active site
    (this multiple choice question has been scrambled)
  24. In the induced-fit model of enzyme action, the enzyme active site

    A) uses a cofactor to change the shape of a substrate
    B) stays the same shape while causing a change in the shape of the substrate
    C) stays the same shape during substrate binding
    D) uses an inhibitor to adjust its shape for the substrate
    E) adjusts shape to adapt to the shape of the substrate
    E) adjusts shape to adapt to the shape of the substrate
    (this multiple choice question has been scrambled)
  25. The function of the enzyme-substrate complex is to provide an alternative reaction pathway that

    A) changes the concentration of the substrate
    B) decreases the activation energy for the reaction
    C) lowers the energy of the substrate
    D) changes the possible product formed
    E) lowers the energy of the products
    B) decreases the activation energy for the reaction
    (this multiple choice question has been scrambled)
  26. Consider an enzymatic reaction in which the initial concentration of substrate is low. If the amount of enzyme is held constant, but the amount of substrate is increased, the rate of an enzyme catalyzed reaction will

    A) decrease at first, then incrase in a linear fashion
    B) be inhibited by the higher concentrations of substrate
    C) increase in an exponential fashion
    D) stay the same
    E) increase at first in a linear fashion, then remain at a constant high rate
    E) increase at first in a linear fashion, then remain at a constant high rate
    (this multiple choice question has been scrambled)
  27. An irreversible inhibitor is one that

    A) binds to the enzyme with hydrophobic interactions
    B) binds covalently to the enzyme active site
    C) forms hydrogen bonds with the substrate
    D) reacts covalently with the substrate
    E) reacts covalently with a cofactor
    B) binds covalently to the enzyme active site
    (this multiple choice question has been scrambled)
  28. Penicilin functions as an antibiotic by

    A) poisoning bacteria with toxins
    B) acting as an acetylcholinesterase inhibitor
    C) raising the temperature of a bacterium
    D) bonding the metal inons in bacteral electron transport systems
    E) inhibiting the enzymes for cell wall formation in bacteria
    E) inhibiting the enzymes for cell wall formation in bacteria
    (this multiple choice question has been scrambled)
  29. A compound that binds to the surface of an enzyme, and changes its shape so that a substrate cannot enter the active site, is called a(n)

    A) competitive inhibitor
    B) noncompetitive inhibitor
    C) irreversible inhibitor
    D) proenzyme
    E) cofactor
    B) noncompetitive inhibitor
    (this multiple choice question has been scrambled)
  30. When an end product from an enzyme-mediated sequence is also an inhibitor for an earlier step in the reaction sequence, the process is referred to as

    A) irreversible inhibition
    B) concentration control
    C) negative catlysis
    D) feedback control
    E) competitive inhibition
    D) feedback control
    (this multiple choice question has been scrambled)
  31. Allosteric enzymes can control their output of product by

    A) binding the substrate at a site away from the active site
    B) reversible inhibition using the product as the inhibitor
    C) changing the pH in the active site
    D) binding a postive or negative regulator at a noncompetitive site
    E) binding an irreversible inhibitor at the active site
    D) binding a postive or negative regulator at a noncompetitive site
    (this multiple choice question has been scrambled)
  32. When a cofactor is a small organic molecule, it is known as a(n)

    A) coenzyme
    B) vitamin
    C) zymogen
    D)isoenzyme
    E) regulator
    A) coenzyme
    (this multiple choice question has been scrambled)
  33. The B vitamins are examples of

    A) essential amino acids
    B) vitamnis that are stored in the liver
    C) water-soluble vitamins
    D) oil soluble vitamins
    E) essential minerals
    C) water-soluble vitamins
    (this multiple choice question has been scrambled)
  34. A biological catalyst is called a(n) ______.

    A) substrate
    B) coenzyme
    C) cofactor
    D) enzyme
    E) lipid
    D) enzyme
    (this multiple choice question has been scrambled)
  35. Enzymes that catalyze the same reactions but have slightly different structures are called _____.

    A) coenzymes
    B) isoenzymes
    C) noncompetitive
    D) competitive
    E) cofactors
    B) isoenzymes
    (this multiple choice question has been scrambled)
  36. A diet very low in vitamin C can lead over time to the condition _______.

    A) carpal tunnel syndrom
    B) scurvy
    C) anorexia nervosa
    D) cancer
    E) rickets
    B) scurvy
    (this multiple choice question has been scrambled)

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