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BCH461_Chapter2 - online

BCH461_Chapter2 - online - Chapter 3 Amino Acids Peptides...

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Chapter 3  Amino Acids, Peptides, and Proteins Multiple Choice Questions 1. Peptides and proteins Pages: 87–88 Difficulty: 2 Ans: C Which of the following is correct with respect to the amino acid composition of proteins?  A) Larger proteins have a more uniform distribution of amino acids than smaller proteins.  B) Proteins contain at least one each of the 20 different standard amino acids.  C) Proteins with different functions usually differ significantly in their amino acid composition.  D) Proteins with the same molecular weight have the same amino acid composition.  E) The average molecular weight of an amino acid in a protein increases with the size of the protein.  2. Peptides and proteins Page: 87 Difficulty: 2 The average molecular weight of the 20 standard amino acids is 138, but biochemists use 110 when  estimating the number of amino acids in a protein of known molecular weight.  Why?  3. Peptides and proteins Page: 88 Difficulty: 1 In a conjugated protein, a prosthetic group is:  4. Peptides and proteins Page: 88 Difficulty: 1 Prosthetic groups in the class of proteins known as glycoproteins are composed of: 
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Chapter 3   Amino Acids, Peptides, and Proteins 
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