Final Exam 2
All of the choices listed are representations of the same molecule except ________.
(CH3)2CHCH2CH3
Which reactant should be used to convert propene to 1,2-dichloropropane?
Cl2
The tertiary structure of most enzymes is
globular.
Chemicals that cause mutations are called
mutagens.
Which of the following would at best be only very slightly soluble in water?
1-hexanol
How many hydrogens are present in a molecule composed of a six membered ring of carbon atoms and no double or triple bonds?
12
Which compound is a tertiary alcohol?
2-methyl-2-hexanol
How many carbon atoms are there in the longest continuous chain of the molecule shown? (CH3)2CH-(CH2)5-CH3
8
The complete metabolism of one molecule of stearic acid, a fatty acid with 18 atoms of carbon, would require ________ turns of the beta-oxidation cycle.
8
The complete metabolism of one molecule of stearic acid, a fatty acid with 18 atoms of carbon, would produce ________ molecules of acetyl-SCoA.
9
The N-terminal amino acid in the peptide Ala-Leu-Gly-His-Pro is
Alanine.
Which statement does not correctly describe structural differences between DNA and RNA?
All of the statements are correct.
Ethylene and acetylene are the common names for the molecules ________ and ________, respectively.
C2H4 and C2H2
An amine that is insoluble in water can be made to dissolve by adding it to an aqueous solution of
HCl.
Insulin increases the rate at which
More than one response is correct.
Which molecule is not a ketone body?
They are all ketone bodies.
When a new strand of RNA is transcribed from the DNA strand shown, its base sequence will be Informational strand of DNA: TTACGGAT Template strand of DNA: AATGCCTA
UUACGGAU.
Which of the following fat-soluble vitamins is associated with blood clotting factors?
Vitamin K
A cyclic metabolic sequence can best be described as one in which
a series of reactions regenerates the initial reactant.
In many catabolic processes the principal product is ________ to be processed in the ________.
acetyl coenzyme A, citric acid cycle
All of the following chemicals are part of the urea cycle except
acetyl-SCoA.
The common chemical name of aspirin is
acetylsalicylic acid.
Which protein is considered to be a globular protein?
albumin
All of the families below include functional groups which contain oxygen except
alkyl halides.
The amino acid pool is the collection of
all free amino acids in the body.
The peptide bond joining amino acids into proteins is a specific example of the ________ bond.
amide
When a glycoprotein is hydrolyzed, the products would include
amino acids plus carbohydrates.
Which of the following enzymes is not involved in the digestion of proteins?
amylase
Which family of organic molecules is a hydrocarbon?
aromatic
Oxidation of an alcohol group results in formation of a(an) ________ group.
carbonyl
The reactants needed to produce simple polyesters are
diacids and dialcohols.
Tollens' reagent is used to
distinguish aldehydes from ketones.
All of the following can denature proteins without hydrolysis except
enzyme treatment.
The functional group illustrated by R-O-R' is an
ether.
The organic chemical produced in the largest quantities in the U.S. is
ethylene
The common name of CH2(OH)CH2OH is
ethylene glycol (antifreeze).
Which of the following is not a non-coding portion of a DNA molecule?
exon
Which of the following substances are produced from hydrolysis of dietary fats in the small intestine?
fatty acids
Which of the following carbohydrates can also be used as fuel in glycolysis?
galactose, fructose, and mannose
A region on the DNA strand that carries the information needed for the synthesis of a specific protein is called a
gene.
Glycogenolysis does not occur in muscle tissue because it lacks which of the following enzymes?
glucose-6-phosphatase
The most important monosaccharide for energy production is
glucose.
Which pathway converts glucose to its storage form in animals?
glycogenesis
The following reaction would most likely be catalyzed by an enzyme of which class? sucrose + H2O → glucose + fructose
hydrolase
An enzyme that is classified as a hydrolase is involved in ________ reactions.
hydrolysis
An enzyme that catalyzes the conversion of a cis double bond to a trans double bond is classified as a(an)
isomerase.
The theory of enzyme mechanism that suggests a rigid, inflexible molecule is the ________ model.
lock-and-key
Which lipoprotein transports cholesterol from the liver to sites where it is used in cell membranes or in steroid synthesis?
low-density lipoproteins
The reaction conditions which would result in formation of disulfides from thiols are
mild oxidizing.
The conversion of cyclic glucose between the alpha form and the beta form is called
mutarotation.
Which molecule is a heterocyclic compound?
none of these
All of the following are properties of acetone except
nutrient.
The process by which the cell produces ATP in the mitochondria is called
oxidative phosphorylation
Reduction of an aldehyde produces a
primary alcohol.
The most important goal of glucose metabolism is
production of ATP as an energy source for all cells.
Codons provide the information needed to synthesize
proteins.
When the amino acid alanine is deaminated, it is converted to
pyruvate.
When the nitrogen atom in an organic compound has four covalent bonds, it is called a
quaternary ammonium ion.
The most common reactions of carboxylic acids or their derivatives involve
replacement of the group bonded to the carbonyl atom.
A mutagen is
something that causes an error in the nucleotide sequence in DNA.
The result of a hydrolysis reaction is what?
splitting of a molecule into the component substances
All of the following are major functions of proteins except
storage of energy.
The isoelectric point of an amino acid is
the pH at which it exists in the zwitterion form.
Common reducing reactions of monosaccharides are due to
the presence of a carbonyl group, usually on the #1 carbon atom.
What is the role of a chylomicron?
to transport triacylglycerols in the bloodstream