The structural classification of proteins (based on motifs) is based primarily on their O amino acid sequences ○ evolutionary relationships O cellular functions ○ secondary structure content and arrangement O subunit content and arrangement
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- Describe in detail the four levels of protein structureWhich of the following levels of protein architecture is least likely affected by changes in pH? O Secondary Structure Quaternary Structure O Tertiary Structure O Primary StructureWhich 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
- Tertiary structures refer to the three-dimensional arrangement of every atom in the molecule. On the other hand, primary structures refer to the stable arrangements of amino acid residues in a protein that give rise to recurring patterns. O Both statements are correct O Both statements are incorrect O The first statement is incorrect while the second statement is correct O The first statement is correct while the second statement is incorrectProtein structures have several different levels of organization. In the space below indicate the type of molecular bonds that can contribute to each level of organization: primary- secondary- tertiary- quarternary-The primary structure of proteins results from (choose the best answer) O assistance from chaperonin enzymes O the sequence of amino acid subunits that make up the protein polymer O the twisting, bending, and coiling resulting from hydrogen bonds into spirals and sheets O the folding and reshaping that results from hydrophobic interactions and the formation of disulfide bridges between cysteine amino acids in the polymer
- Describe the four levels of protein structure and what kind of forces create each level of structure?Describe in no more than ten sentences the four levels of protein structure, and cite the non-covalent force(s) in each level.Which of the following factors do not stabilize the 3-D structure of a folded protein? O Disulfide bonds O Van der Waals interactions O Hydrogen bonds O Electrostatic interactions O Hydrophobic bonds Metal-ion protein interactions
- Which of the following levels of protein structure may be affected by hydrogen bonding? (a) primary and secondary (b) primary and tertiary (c) secondary, tertiary, and quaternary (d) primary, secondary, and tertiary (e) primary, secondary, tertiary, and quaternaryDescribe 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?describe the 4 structural levels of a protein