1-The quaternary structure of proteins is the direction of twisting of the helic
ID: 997354 • Letter: 1
Question
1-The quaternary structure of proteins is
the direction of twisting of the helical structure
the aggregation of the tertiary or secondary structures
a four-side protein structure
how amino acids hydrogen bond to every fourth amino acid in a polypeptide chain
2-What is the essential structural difference between vegetable oils and vegetable fats?
oils have more double bonds
oils contain no carbon
oils contain no oxygen
nothing
3-Hydrolysis of lactose yields
D-glucose only
D-glucose and D-fructose
-D-glucose and -D-glucose
D-galactose and D-glucose
4-Hydrolysis of sucrose yields
D-glucose only
D-glucose and D-fructose
-D-glucose and -D-glucose
D-galactose and D-glucose
5-When monosaccharides such as D-glucose are joined to form the polysaccharide starch, at each bond between two monosaccharides,
a water molecule hydrogen bonds the two monomers together
there is a peptide bond
there is a hydrated carbon atom
a water molecule is split out
6-For making permanent hair waves it is necessary to break these bonds
ionic bonds
disulfide bonds
hydrogen bonds
the sulfur hydrogen bonds
7-Amino acid monomers are joined to make a polypeptide chain by
an acid-base reaction
formation of a peptide bond
splitting out a water molecule
all of the above choices
8-Hydrolysis is
a water-splitting reaction
an oxidation
a reduction
required prior to a combustion
9-The toughness of both skin and hair in contrast to other protein structures is due to
the strength of the carbon-carbon bond
the percentage composition relative to the amino acid content
cross-linkages such as the disulfide bond
the presence of ether linkages between the amino acid units
10-Which oil contains a higher percentage of saturated fatty acid than the others?
olive oil
coconut oil
corn oil
all oils contain less saturated fatty acid than unsaturated fatty acid
the direction of twisting of the helical structure
B.the aggregation of the tertiary or secondary structures
C.a four-side protein structure
D.how amino acids hydrogen bond to every fourth amino acid in a polypeptide chain
Explanation / Answer
1) B) the aggregation of the tertiary or secondary structures
2) A) oils have more double bonds
3) D) D-galactose and D-glucose
4) B)D-glucose and D-fructose
5) B) there is a peptide bond
6) C) hydrogen bonds
7) B) formation of a peptide bond
8) A) a water-splitting reaction
9) C) cross-linkages such as the disulfide bond
10) D) all oils contain less saturated fatty acid than unsaturated fatty acid
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