Which of the following compounds CANNOT form hydrogen bonds with water?
E) All of the compounds above are capable of forming hydrogen bonds with water
Name the following compound: CH3-NH-CH3
a) ethyl amine
b) dimethyl ether
e) dimethyl amine
e) dimethyl amine
In response to allergic reactions or injury to cells, the body increases the production of
When acetic acid reacts with ammonia, NH3, the reaction called amidation yields
In the formation of N-ethylacetamide, the reactant(s) is(are)
B) acetic acid and ethylamine
What relation does the boiling point of an amine have to a simliar hydrocarbon?
Amines can form _____ bonds with other molecules.
In what form are amine-containing drugs often administered?
E) amine salt
Which of the following is NOT a function of proteins?
D) stores the genetic information of a living organism
Sucrase, the protein that facilitates the hydrolysis of sucrose, would be classified as _____ protein.
The peptide bonds that combine amino acids in a protein are
B) amide bonds
The bonds that are important in the secondary structure of a protein are
E) hydrogen bonds
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, GlyLeuVal, ValLeuGly, ValGlyLeu, LeuGlyVal, LeuValGly
Hemoglobin has a total of _______ protein chains in its quaternary structure.
In a typical amino acid zwitterion, the carboxylate end is
What process occurs when heat, acids, bases, and heavy metal ions cause a los of biological function of a protein?
In digestion, proteins are broken down into amino acids by a(n) ______ reaction.
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.
A noncompetitive inhibitor
C) alters the three-dimensional structure of the enzyme
In any reaction catalyzed by an enzyme, the reaction molecule is called the
When a substance bonds to an enzyme for reaction, its place of binding is the
E) active site
In the induced-fit model of enzyme action, the enzyme active site
D) adjusts shape to adapt to the shape of the substrate
The function of the enzyme-substrate complex is to provide an alternative reaction pathway that
C) decreases the activation energy for the reaction
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) increase at first in a linear fashion, then remain at a constant high rate
An irreversible inhibitor is one that
D) binds covalently to the enzyme active site
Penicilin functions as an antibiotic by
B) inhibiting the enzymes for cell wall formation in bacteria
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)
E) noncompetitive inhibitor
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
D) feedback control
Allosteric enzymes can control their output of product by
D) binding a postive or negative regulator at a noncompetitive site
When a cofactor is a small organic molecule, it is known as a(n)
The B vitamins are examples of
B) water-soluble vitamins
A biological catalyst is called a(n) ______.
Enzymes that catalyze the same reactions but have slightly different structures are called _____.
A diet very low in vitamin C can lead over time to the condition _______.