18)All of the following contain amino acids except18)A)insulin.B)cholesterol.C)antibodies.D)enzymes.E)hemoglobin.19)There are 20 different amino acids. What makes one amino acid different from another?19)Figure 5.520)Which of the following statements is/are true regarding the chemical reaction illustrated in Figure5.5?20)21)Polysaccharides, lipids, and proteins are similar in that they21)22)Upon chemical analysis, a particular polypeptide was found to contain 100 amino acids. Howmany peptide bonds are present in this protein?22)A)98B)101C)100D)99E)97
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SHORT ANSWER. Write the word or phrase that best completes each statement or answers the questionRefer to Figure 5.6 to answer the following questions.Figure 5.623)At which bond would water need to be added to achieve hydrolysis of the peptide, back toits component amino acid?23)24)Which bond is a peptide bond?24)25)Which bond is closest to the N-terminus of the molecule?25)26)Which bond is closest to the carboxyl end of the molecule?26)MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the quest27)How many different kinds of polypeptides, each composed of 12 amino acids, could be synthesizedusing the 20 common amino acids?27)28)Which bonds are created during the formation of the primary structure of a protein?28)29)What maintains the secondary structure of a protein?29)30)The helix and the pleated sheet are both common polypeptide forms found in which level ofprotein structure?30)A)tertiaryB)primaryC)quaternaryD)secondaryE)all of the above
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