Bio 151 - Exam 2 (study guide) Questions And Answers

Match each example or description with the corresponding level of protein structure. primary secondary tertiary quaternary - ANS 1. The sequence of amino acids in the polypeptide chains. Ala-Gly-Tyr-Lys-Met-Trp-Phe 2. Alpha-helix, beta-pleated sheet, results from hydrogen bonds between polar groups in the polypeptide backbone, repeated pattern of coiling or folding within a polypeptide chain. 3. the overall 3-D shape of polypeptide or protein. Results from the bending and folding of a polypeptide chain that occurs due to a variety of interactions between the amino acid side chains. 4. refers to the way several different polypeptide chains fit together to form the final protein. Only found in proteins composed of more than one polypeptide chain 1. A distinctive and recurrent sequence of structural elements within a protein, such as helix-turn-helix, is called a domain. T OR F - ANS F 2. Many proteins are composed of several different regions that are specialized to carry out specific functions. T OR F - ANS T 3. Specific functional regions within a protein are called motifs. T OR F - ANS F 4. As a polypeptide chain folds, each domain takes its proper shape more or less independently of the others. T OR F - ANS T 5. If we replace one domain of a protein with a domain from a different protein using molecular biology techniques, then the entire protein will become inactive. T OR F - ANS F Identify the bonds and interactions that help maintain a protein's 3-dimensional shape or conformation. - ANS ? Identify the functional groups highlighted in each example. - ANS ? IN NOTES A DNA molecule with 24% guanine would have how much adenine? - ANS 26% All carbohydrates are composed of one or more ____________ - ANS A protein is composed of one or more long, unbranched chains called ____________ which are coiled and folded into a specific 3-dimensional shape. A polypeptide is composed of monomers called ____________ . Nucleic acids are composed of monomers called ____________ . Triglycerides are composed of glycerol and ____________ . Glucose, starch, and cellulose are all examples of ____________ . RNA and DNA are examples of ____________ . Fats, steroids, and terpenes are examples of ____________ . Polymers are formed by linking monomers together through ____________ reactions. Breaking the bonds between the subunits of a polymer involves ____________ reactions. During a hydrolysis reaction, a molecule of water is ____________ . During a condensation reaction, a molecule of water is ____________ - ANS A polypeptide is composed of monomers called ____________ . - ANS Nucleic acids are composed of monomers called ____________ - ANS