Q. No.An enzyme brings about :
1. Decrease in reaction time
2. Increase in reaction time
3. Increase in activation energy
4. Reduction in activation energy
1. Decrease in reaction time
2. Increase in reaction time
3. Increase in activation energy
4. Reduction in activation energy
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The high energy bonds in an ATP molecule are between :
1. Ribose and nitrogenous base
2. Nitrogenous base and phosphate
3. Ribose and phosphate
4. Phosphate groups
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A glycosidic bond connects :
1. two monosaccharides
2. two amino acids
3. two fatty acids
4. a fatty acid and a glycerol
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All of the following are true of protein denaturation except that it
1. is a shape change
2. is always irreversible
3. may be caused by a pH change
4. could result from a temperature change
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Which of the following is an essential amino acid?
1. Phenylalanine
2. Aspartic acid
3. Glutamic acid
4. Serine
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Assuming they all had the same number of carbon atoms, which of the following has the most C-H bonds?
1. an unsaturated fat
2. a polyunsaturated fat
3. a polysaccharide
4. a saturated fat
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An alpha helix is a:
1. primary structure of a protein
2. secondary structure of a protein
3. tertiary structure of a protein
4. quaternary structure of a protein
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Why is cellulose so difficult for most animals to digest?
1. they don’t have the proper enzyme to break the bonds between subunits
2. cellulose is made up of chitin, which is indigestible
3. the bonds holding cellulose subunits together are extremely strong, stronger than in any other macromolecule
4. there are many hydrogen bonds holding the subunits together
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