MAC2602 ASSIGNMENT 3

MAC2602 ASSIGNMENT 3 Suppose you discovered a new amino acid. Its R-group contains only hydrogen and carbon atoms. Predict the behavior of this amino acid. It is hydrophobic. Proteins are polymers of _____. amino acids What type of bond joins the monomers in a protein's primary structure? peptide Which of these illustrates the secondary structure of a protein? string with only two curls The secondary structure of a protein results from _____. hydrogen bonds What name is given to the process seen in this animation? dehydration synthesis This animation illustrates the functioning of a _____ protein. transport Arrow A is indicating a(n) _____ protein. structural Arrow D is indicating a _____ protein. receptor Which of these does NOT contain a structural protein? ovalbumin Defensive proteins are manufactured by the _____ system. immune Which of the following best describes primary structure in proteins? It is the sequence of amino acids in the complete protein. An isomer of a particular molecule is a molecule that has the same formula, but a different structure. Classify these amino acids as acidic, basic, neutral polar, or neutral nonpolar. basic: arginine neutral polar: asparagine neutral nonpolar: alanine Classify these amino acids as acidic, basic, neutral polar, or neutral nonpolar. acidic: glutamic acid neutral polar: threonine neutral nonpolar: tryptophan. At the pH found in cells (about 7.0), what happens to the carboxyl group on an amino acid? It acts as an acid and loses a proton, giving it a negative charge. Complete the following vocabulary exercise relating to the level of structure in proteins. 1. Quaternary structure is the result of two or more protein subunits assembling to form a larger, biologically active protein complex. 2. Secondary structure describes the alpha-helices and beta-sheets that are formed by hydrogen bonding between backbone atoms located near each other in the polypeptide chain. 3. Primary structure is the sequence of amino acids in a protein. 4. Tertiary structure is achieved when a protein folds into a compact, three-dimensional shape stabilized by interactions between side-chain R groups of amino acids. Which one of the following is not a component of each monomer used to make proteins? a phosphorous atom, P.