
Which statement is false?

Selected Answer:
C.
Hydrophobic amino acids are usually positively or negatively charged.
Correct Answer:
C.
Hydrophobic amino acids are usually positively or negatively charged.
Question 2
2.5 out of 2.5 points
Melibiose is a carbohydrate found in some plant juices. Which of the following
statements concerning melibiose is INCORRECT?

Selected Answer:
A.
It contains an α(1→5) glycosidic linkage.
Correct Answer:
C.
It contains an α(1→5) glycosidic linkage.
Question 3
2.5 out of 2.5 points
A proenzyme is a functional enzymatic combination of the apoenzyme and cofactor.

Selected Answer:
False
Correct Answer:
False
Question 4
2.5 out of 2.5 points
Proteins that are soluble in water are termed globular.

Selected Answer:
False
Correct Answer:
False
Question 5
2.5 out of 2.5 points
Condensation of a molecule of phenylalanine with one of tyrosine can produce two possible dipeptide
molecules.

Selected Answer:
True
Correct Answer:
True
Question 6
2.5 out of 2.5 points
Bile salts contain steroid molecules.

Selected Answer:
True
Correct Answer:
True
Question 7
2.5 out of 2.5 points
What is the IUPAC name of the missing product in the following reaction?

Selected Answer:
D.
butanol
Correct Answer:
D.
butanol
Question 8
2.5 out of 2.5 points
The glycosidic linkage found in some carbohydrates is actually an ester bond.

Selected Answer:
False
Correct Answer:
False
Question 9
2.5 out of 2.5 points
Fatty acids react with long chain aldehydes to produce waxes.

Selected Answer:
False
Correct Answer:
False
Question 10
2.5 out of 2.5 points
The pyrimidines are found in proteins.

Selected Answer:
False
Correct Answer:
False
Question 11
2.5 out of 2.5 points
The most oxidized organic form of a primary alcohol is a carboxylic acid.

Selected Answer:
True
Correct Answer:
True
Question 12
0 out of 2.5 points
Compared to a protein molecule which has no electrical charge, a positively charged protein will be more
soluble in water.

Selected Answer:
False
Correct Answer:
True
Question 13
2.5 out of 2.5 points
Which statement concerning the compound ethanoic acid is FALSE?

Selected Answer:
C.
Its condensed structure is CH3CH2COOH.
Correct Answer:
A.
Its condensed structure is CH3CH2COOH.
Question 14
2.5 out of 2.5 points
When a glycosidic linkage is formed between two monosaccharides, each with the
formula C6H12O6, the resulting disaccharide will have the formula C12H22O11.

Selected Answer:
True
Correct Answer:
True
Question 15
2.5 out of 2.5 points
Amines behave as acids when dissolved in water.

Selected Answer:
False
Correct Answer:
False
Question 16
2.5 out of 2.5 points
The two essential fatty acids are oleic and linoleic acid.

Selected Answer:
False
Correct Answer:
False
Question 17
0 out of 2.5 points
An aldehyde will react with Tollens' reagent to produce a silver mirror, but a carboxylic acid will not.

Selected Answer:
False
Correct Answer:
True
Question 18
2.5 out of 2.5 points
Most carboxylic acids are strong acids.

Selected Answer:
False
Correct Answer:
False
Question 19
2.5 out of 2.5 points
The oxidation of propanol produces propanone.

Selected Answer:
False
Correct Answer:
False
Question 20
2.5 out of 2.5 points
Which enantiomer of glyceraldehyde is represented in the following structure?

Selected Answer:
B.
L-glyceraldehyde
Correct Answer:
D.
L-glyceraldehyde
Question 21
2.5 out of 2.5 points
Which of the statements concerning the compound below is INCORRECT?

Selected Answer:
E.
It is a tertiary amine.
Correct Answer:
C.
It is a tertiary amine.
Question 22
2.5 out of 2.5 points
Consider the compound represented below. Which of the following best describes it?

Selected Answer:
A.
It is an unsaturated fatty acid.
Correct Answer:
E.
It is an unsaturated fatty acid.
Question 23
0 out of 2.5 points
2-Amino-4-methylpentanoic acid (common name leucine) is an essential amino acid
found in the proteins of the human body. Which of the following properly represents the
structure of this compound?
Selected Answer:
Correct Answer:

A.
None of these answers are correct.
A.
Question 24
2.5 out of 2.5 points
The principal monosaccharide in milk is lactose.

Selected Answer:
False
Correct Answer:
False
Question 25
2.5 out of 2.5 points
In feedback inhibition of an enzyme-catalyzed biosynthetic pathway, what frequently
serves as a negative allosteric effector?

Selected Answer:
B.
the final product of the pathway
Correct Answer:
E.
the final product of the pathway
Question 26
2.5 out of 2.5 points
Isomerases can rearrange the functional groups within a molecule.

Selected Answer:
True
Correct Answer:
True
Question 27
2.5 out of 2.5 points
Acetic acid is the simplest carboxylic acid.

Selected Answer:
False
Correct Answer:
False
Question 28
2.5 out of 2.5 points
Which of the following is not a lipid?

Selected Answer:
D.
tryptophan
Correct Answer:
D.
tryptophan
Question 29
2.5 out of 2.5 points
Hydrolysis of an amine produces an amide.

Selected Answer:
False
Correct Answer:
False
Question 30
2.5 out of 2.5 points
4-Amino butanoic acid (common name GABA) is a neurotransmitter found in the brain's
nerve cells. Which of the following properly represents the structure of this compound?

Selected Answer:
B.
Correct Answer:
B.
Question 31
2.5 out of 2.5 points
The general structure of a soap molecule is shown below. The carboxylate “head” of the
soap molecule can be described as:
Selected Answer:
D.
none of these answers are correct
Correct Answer:

A.
none of these answers are correct
Question 32
2.5 out of 2.5 points
Which of the following is not a class of enzymes?

Selected Answer:
B.
peptases
Correct Answer:
D.
peptases
Question 33
0 out of 2.5 points
Which of the following is a highly branched polymer of glucose?

Selected Answer:
B.
amylose
Correct Answer:
B.
none of these answers are correct
Question 34
2.5 out of 2.5 points
Which of the following is NOT classified as a type of eicosanoid?

Selected Answer:
D.
steroids
Correct Answer:
C.
steroids
Question 35
0 out of 2.5 points
Salicin is a naturally occurring pain reliever isolated from the bark of willow trees.
Which of the following statements concerning the structure of salicin is correct?

Selected Answer:
A.
It contains both a hemiacetal and an acetal.
Correct Answer:
A.
It contains an acetal.
Question 36
2.5 out of 2.5 points
The rates of enzyme-catalyzed reactions increase with increasing pH.

Selected Answer:
False
Correct Answer:
False
Question 37
0 out of 2.5 points
A chemist needs to reflux a reaction mixture at high temperature. This requires the use of
a high-boiling organic solvent. Of the following solvents available for use, which would
have the highest boiling point?

Selected Answer:
C.
Correct Answer:
B.
Question 38
2.5 out of 2.5 points
Which of the following is a source of complete protein?

Selected Answer:
C.
chicken
Correct Answer:
D.
chicken
Question 39
2.5 out of 2.5 points
The diagram below shows the energy pathway of an uncatalyzed reaction. How does the
energy diagram change when an enzyme is used in the same reaction?
Selected Answer:
A.
The activation energy decreases.
Correct Answer:

A.
The activation energy decreases.
Question 40
0 out of 2.5 points
The compound decanal contributes to the odor and flavor of an orange. Which of the
following statements about decanal is FALSE?
Selected Answer:
A.
It is insoluble in water.
Correct Answer:
C.
It can form hydrogen bonds with other molecules of decanal.
Sunday, November 24, 2013 11:46:02 AM EST