ch02 - Chapter 2 Protein Composition and Structure Matching...

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Chapter 2 Protein Composition and Structure Matching Questions Use the following to answer questions 1-10: Choose the correct answer from the list below. Not all of the answers will be used. a) L -amino acids b) water c) protons d) Zwitterions e) secondary structure f) tertiary structure g) Ramachandran h) cysteine i) extracellular j) histidine k) proline l) Sanger m) D -amino acids 1 ____________ Chiral type of amino acids found in proteins. Ans: a Section: 2.1 2 ____________ Another name for dipolar molecules. Ans: d Section: 2.1 3 ____________ Disulfide bonds are formed by pairs of which amino acid? Ans: h Section: 2.1 4 ____________ The amino acid with a p K a near neutral pH. Ans: j Section: 2.1 5 ____________ When a peptide bond is formed, what molecule is also made? Ans: b Section: 2.2
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Chapter 2 Protein Composition and Structure 6 ____________ Where are proteins with extensive disulfide links likely to be found? Ans: i Section: 2.2 7 ____________ This amino acid residue disrupts the α helix because its side chain contains a unique ring structure that restricts bond rotations. Ans: k Section: 2.1 8 ____________ Name of the plot that allows one to investigate the likely orientation of certain amino acid pairs. Ans: g Section: 2.2 9 ____________ The type of structure to which α helices, β sheets, and turns are referred. Ans: e Section: 2.3 10 ____________ The overall structure of a protein is referred to as Ans: f Section: 2.4 Fill in the Blank Questions 11 The amino acid that contains a weakly acidic “phenolic” group is _________________. Ans: tyrosine Section 2.1 12 _______________ is a fibrous protein and is the primary component of wool and hair. Ans: Α keratin Section 2.3 13 Every third residue in the protein collagen is ____________________. Ans: glycine Section 2.3 14 Disulfide bonds in proteins can be reduced to free sulfhydryl groups by reagents such as _____________________. Ans: β mecaptoethanol Section 2.6 15 A protein is considered to be __________________ when it is converted into a randomly coiled structure without its normal activity. Ans: denatured Section 2.6 2
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Chapter 2 Protein Composition and Structure 16 ______________________ is the major fibrous protein present in skin, bone, tendon, cartilage, and teeth. Ans:
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This note was uploaded on 12/08/2009 for the course CHEM chem950 taught by Professor Mann during the Spring '09 term at CUNY Baruch.

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ch02 - Chapter 2 Protein Composition and Structure Matching...

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