CBExam1 - Bi336: Cell Biology Midterm 1: 21. Oct. 2002...

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Name:_________________________________ Select the ONE answer that best answers the question, read questions carefully! 1.Based on organization and internal structures (as opposed to evolutionary relationship), the most basic division of all cells is into the following two types: a. Archaea and Bacteria ; b. Eukarya and Archaea ; c. * Prokaryotes and eukaryotes; d. Cindaria and Monera; e. Plant and animal. 2.Chloroplasts are derived from: a. * Endosymbiotic bacteria; b. Invagination of the eukaryotic cell membrane; c. Expression of nuclear genes; d. Archaeal symbionts; e. None of the above. 3.The Golgi apparatus can be found in: a. Bacteria ; b. Archaea ; c. * Eukarya ; d. a and b; e. a and c. 4. Flagella are present in which groups of organisms? a. Prokaryotes b. Eukaryotes c. Neither d. * Both 5.Most of the metabolic and evolutionary diversity of life on Earth can be found within the: a. Insects; b. Mollusks; c. Animals; d. * Prokaryotes; e. Fungi. 6.Prior to the radical changes in taxonomy introduced in the 1980's, based largely on ribosomal RNA sequences, Bacteria and Archaea were classified together in the same: a. Genus; b. Phylum; c. Class; d. * Kingdom; e. Domain. 7. Chaperones are: a. * proteins that help other proteins to fold properly; b. protein molecules that guide newly synthesized proteins to their correct site in the cell; c. lipid tubules; d. recognition proteins on the cell surface; e. none of the above. 8.Ester bonds are formed from: a. an amine and a carboxyl group; b. an amine and a methyl group; c. an alcohol and an amine; d. an alcohol and a methly group; e. * an alcohol and a carboxyl group. 9.DNA contains: a. a carboxyl group; b. a methyl group; c. an amino group; d. a and b; e. * b and c. 10.Lysine, which has a R group of –(CH 2 ) 4 NH 3 + , is a member of what group of amino acids: a. * polar charged amino acids; b. polar uncharged amino acids; c. nonpolar amino acids; d. other amino acids. 11. The types of amino acid side chains found on the surface of proteins are generally: a. hydrophobic b. * charged c. non-polar d. a and b e. a and c 12. Alpha-helices and beta sheets are hallmarks of what level of protein structure? a. primary structure; b. * secondary structure; c. tertiary structure; d. quaternary structur 13.The valence of oxygen is: a. * 2; b. 3; c. 4; d. 6; e. 8. 14.A two-electron reduction of a carboxyl group
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CBExam1 - Bi336: Cell Biology Midterm 1: 21. Oct. 2002...

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