Module 3 Portage Learning Biochem Correctly Answered Questions Graded A+

Module 3 Portage Learning Biochem Name three different functions of proteins. - Answer-Transport, hormones, catalysis, structure, and protection What function does a protease have? - Answer-catalysis. It degrades proteins What is the function of hormones? - Answer-These proteins communicate from one cell to another What are the functional groups common to all amino acids? - Answer-amine and carboxylic acid Briefly describe the five major groupings of amino acids. - Answer-The amino acids are grouped into 1) nonpolar, aliphatic 2) nonpolar and aromatic 3) polar but neutral, 4) acidic, and 5) basic. What is the name, one-letter abbreviation, and three-letter abbreviation of the following amino acid? - Answer-Arginine, R, Arg What amino acid can form a disulfide bond - Answer-cysteine Which amino acid is the only one to have its side chain connected to the amine group? - Answer-Proline Consider the following protein structure. Fill the blanks with the appropriate term below. - Answer-(A) alpha helices (B) globular (C) quaternary Consider the following pentapeptide: ETYLVD. Which amino acid is at the N terminal? Which is at the C terminal? - Answer-E is at the N-terminal, and D is at the C-terminal Consider the following tetrapeptide. A) Use the three-letter abbreviations to write the representation of the following tetrapeptide. B) How many peptide bonds are in this peptide? - Answer-A) Lys-Asp-Ile-Thr B) 3 peptide bonds connect four amino acids. Differentiate between protein tertiary structure and protein quaternary structure. - Answer-Tertiary structure is the conformation or shape of a single polypeptide chain. Quaternary structure is the orientation of multiple subunits. Proteins typically adopt either a conformation that is fibrous or - Answer-Globular What is the function of an enzyme? - Answer-to accelerate the rate of a biological reaction How does a competitive inhibitor differ from a uncompetitive inhibitor? - Answer-A competitive inhibitor binds at the active site of the enzyme. An uncompetitive inhibitor binds at a site distinct from the active site, but it still inhibits the enzyme. What three factors influence enzyme catalyzed reactions? - Answer-pH, temperature, and concentration of enzyme and substrate