ss2008Bio93+MT+B+key

ss2008Bio93+MT+B+key - Name ID Seat Number Bio93 Midterm...

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Name ID Seat Number Bio93 Midterm Version B Total of 56 points. MT = 30% of grade 1
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Name ID Seat Number Multiple choice 1 point each (except #1). Choose the BEST answer for each question. 1. The exam I am taking is a) Version A b) VersionB 2. Characterization of a toxic bacterial infection revealed that it strongly inhibited the function of the nucleolus. Infection with this bacteria inhibits the following processes: A) synthesis of cytoplasmic proteins B) synthesis of membrane proteins C) synthesis of messenger RNA D) synthesis of tRNA E) a and b 3. Which of the following descriptions best fits the class of molecules known as nucleotides? A) a nitrogenous base and a phosphate group B) a nitrogenous base and a pentose sugar C) a nitrogenous base, a phosphate group, and a pentose sugar D) a phosphate group and an adenine or uracil E) a pentose sugar and a purine or pyrimidine 4. Lysosome enzymes _______________? a) Oxidize fats b) Hydrolyze fats c) Function best at low pH d) Are glycosylated e) b, c and d 5. Nuclear anchorage is one function of a) nuclear pores b) intermediate filaments c) nucleoporins d) nuclear envelope e) ATP 6. A chaperones main function is related to A) protein degradation B) protein synthesis C) protein transport D) protein phosphorylation E) protein folding 7) A strong covalent bond between amino acids that functions in maintaining a polypeptide's specific three-dimensional shape is a/(an) A) ionic bond. B) hydrophobic interaction. C) van der Waals interaction. D) disulfide bond. 2
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Name ID Seat Number E) hydrogen bond. 8. In sarcomeres contraction occurs by interactions between A) actin and myosin B) dynein and kinesin C) dynein and microtubules D) microfilaments and kinesin E) ATP kinesin and mitrotubules 9) Which type of cell would probably provide the best opportunity to study lysosomes? A) muscle cell B) nerve cell C) phagocyte D) leaf cell of a plant E) bacterial cell 10) Buffers are substances that help resist shifts in pH by A) releasing H + in acidic solutions. B) donating H + to a solution when they have been depleted. C) releasing OH - in basic solutions. D) accepting H + when the are in excess. E) both B and D 11) The R group or side chain of the amino acid serine is –CH 2 -OH. The R group or side chain of the amino acid alanine is –CH 3 . Where would you expect to find these amino acids in a globular protein in aqueous solution? A) Serine would be in the interior, and alanine would be on the exterior of the globular protein.
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ss2008Bio93+MT+B+key - Name ID Seat Number Bio93 Midterm...

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