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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- Which of the following statements about protein structure is CORRECT O a. Fibrous proteins can have rigid quaternary structure O b. The stability of the quaternary structure in proteins is mainly a result of covalent bonds among the subunits O c. The denaturation of proteins always leads to irreversible loss of secondary and tertiary structure d. The information required for the correct folding of a protein is contained in the specific sequence of amino acids along the polypeptide chain O e. The formation of a disulfide bond in a protein requires that the two participating cysteine residues be adjacent to each other in the primary sequence of the proteinDescribe 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 Structure
- 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 tertiarych 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 moIn 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? ____________________
- Which 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 subunitsProtein 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-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 incorrect
- Part A What is the highest structural level of protein structure represented in the following image? primary quaternary secondary pentanary tertiary O OThe 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 polymerDescribe the four levels of protein structure and what kind of forces create each level of structure?
