least likely affected by changes
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- The first and major effect in denaturation of proteins is that: a. peptide bonds break. b. helices unwind. c. sheet structures unfold. d. tertiary structure is changed. e. quaternary structures disassemble.Describe the four levels of protein structure. How do a proteins side groups influence its interactions with other substances? What happens when a protein is denatured?Figure 3.23 Which categories of amino acid would you expect to find on the surface of a soluble protein, and which would you expect to find in the interior? What distribution of amino acids would you expect to find in a protein embedded in a lipid bilayer?
- Hydrogen bonds that form a helices and B-pleated sheets are the primary interaction in which level of protein structure? O secondary O quaternary O primary O tertiaryPart A What is the highest structural level of protein structure represented in the following image? primary quaternary secondary pentanary tertiary O OWhich of the following constitutes the primary structure of a protein? O the folding of a polypeptide chain the polypeptide chains stacked on top of each other O the linear sequence of amino acids in a polypeptide chain several polypeptide subunits
- ch one of the following statements about protein structure is NOT correct? . Domains are discrete parts of a protein structure, usually associated with a particula function. true Beta-sheets are stabilised by hydrogen bonds between amino-hydrogens and carbonyl-oxygens from peptide bonds. no adjacent hydrogen bonding Proteins made from three polypeptide chains show quaternary structure. Yes Smaller protein domains come together to from supersecondary structures and moWhich one of the following statements about the structure of proteins is incorrect? O Disulfide bonds provide strong intrachain interactions. Hydrogen bonding stabilizes the a-helix proteins. Nonpolar groups tend to face the outside of a protein in an aqueous solution. lonized amino acid side chains can form salt bridges within a protein. O Heat can disrupt tertiary structure.Give the force of interaction involved in the protein folding of the protein structure A and C: COO CH,C-N-H• • •0- Pleated sheet structure A H C Helical structure CH3 CH3 - CH3 -CHCH,CH, CH- CH, CH3 (CH,),NH, -0-CCH,- C=0..•HN CH, CH, CH,CH CH,CH CH, CH, CH OH 0=C -CH,-S,S-CH,- H,Ñ Structure A: H-bonding: Structure C: Van der Waals O Structure A: Covalent interaction; Structure C: dipole-dipole interaction O Structure A: Salt bridge: Structure C: H-bonding Structure A: Hydrophobic interaction; Structure C: ionic interaction 00000 B
- In the following diagram of a portion of a protein, label the types of interactions that are shown. What level of protein structure are these interactions producing?The following is an example of which level of protein structure? What bonds form this level of structure? Asp-Met-Leu-Trp-Gly-Asn-LysWhich of the following is the first step in folding a linear polypeptide into an ordered functional protein? O Secondary Primary Quaternary Tertiary