1-Which is not true about saponification? a hydrolysis soaps are products a reac
ID: 997352 • Letter: 1
Question
1-Which is not true about saponification?
a hydrolysis
soaps are products
a reaction of fatty acids
a strongly basic solution is required
2-Which is not a lipid?
cholesterol
testosterone
oleic acid
hemoglobin
3-If a molecule of glycine bonds to a molecule of alanine, how many different compounds can be made?
one
two
three
more than three
4-Which base is not common to both DNA and RNA?
guanine
cytosine
thymine
adenine
5-A label says a typical cold cream contains almond oil, rose water, lanolin and spermaceti oil. Which component is the emulsifier?
almond oil
rose water
lanolin
spemaceti oil
6-How many natural amino acids are known?
20
70
hundreds
thousands
7-In recombinant DNA processes,
polynucleotides are synthesized from mononucleotides
all of the genes are joined together
genes (DNA) are cut, spliced, and recombined
there is only the likelihood of the betterment of mankind
8-The most common monosaccharide is
starch
cellulose
fructose
D-glucose
9-The monomers in proteins are
monosaccharides
amino acids
nucleic acids
all optically active
A.a hydrolysis
B.soaps are products
C.a reaction of fatty acids
D.a strongly basic solution is required
Explanation / Answer
1-Which is not true about saponification?
C. a reaction of fatty acids
saponification is a reaction of fat/oil to produce soap (a sodium salt of fatty acid)
2-Which is not a lipid?
C. oleic acid
D. hemoglobin
A Lipid will be an ester of oleic acid with glycerol.
3-If a molecule of glycine bonds to a molecule of alanine, how many different compounds can be made?
B. two
In the first molecule, -COOH of glycine combines with NH2 of alanine
In the second molecule, -COOH of alanine combines with NH2 of glycine.
4-Which base is not common to both DNA and RNA?
C. thymine
DNA contains thymine, RNA contains uracil
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