Exam 1 v2 Answer key

Exam 1 v2 Answer key - Biol 302 Exam 1 Version 2 Answer Key...

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Biol 302 Exam 1 Version 2 Answer Key Name ________________________ February 12, 2008 Last 4 digits of SSN _____________ Multiple Choice. Pick one answer for each question. 1. Which of the following statements regarding amino acids is false? a. There are 20 types of amino acids found in cells. b. In nature, amino acids exist in two forms (L- and D-amino acids). These are optimal isomers. c. Amino acids differ from each other in that their R groups are different; the R groups cause amino acids to have different chemical properties. d. None of the above. 2. True of False. Choose a for True and b for False. The peptide bond is a rigid planar unit. There is no rotation around the peptide bond. 3. True of False. Choose a for True and b for False. The 3-D shape of a protein is determined by the amino acid sequence of the polypeptide chain. 4. When two alpha helices wrap around one other, the resulting structure is called a: a. Beta sheet b. Protein domain c. Coiled-coil d. None of the above 5. True of False. Choose a for True and b for False . Proteins generally bind their ligands by forming strong covalent bonds between the protein binding site and the ligand- these strong bonds are important to make the binding specific. 6. The process by which a RNA copy of a DNA molecule is made is called: a. transcription b. translation c. DNA replication d. DNA repair e. None of the above 7. True of False. Choose a for True and b for False. Uracil can form two hydrogen bonds with adenine. 8. Which of the following statements regarding RNA is false? a. RNA can fold up into a variety of different shapes. b. RNA can form intramolecular basepairs c. RNA is synthesized in either the 5’ to 3’ or the 3’ to 5’ direction d. None of the above 1
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9. Each of the following is required for transcription except: a. double-stranded DNA molecule b. RNA polymerase c. Ribonucleotides d. Primase 10. True of False. Choose a for True and b for False . Like DNA polymerase, RNA polymerase has a proofreading activity. 11. rRNAs function as: a. the adaptors that select amino acids and hold them in place on the ribosome for incorporation into new protein molecules b. part of the core of the ribosome c. part of the splicing machinery d. none of the above 12. True of False. Choose a for True and b for False . In eukaryotic cells, it is often the case that a set of adjacent genes will be transcribed as a single RNA molecule. This set of adjacent genes is termed an operon. 13. Enzyme that joins two DNA fragments by joining the 3’OH end of one fragment to the 5’ phosphate of the second DNA fragment. a. DNA polymerase b. DNA ligase c. primase d. sliding clamp e. helicase 14. Protein that unwinds the DNA double helix to create a short region of single-stranded DNA. a. DNA polymerase
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This note was uploaded on 04/17/2008 for the course BIOL 302 taught by Professor Connollyandkrizek during the Spring '08 term at South Carolina.

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Exam 1 v2 Answer key - Biol 302 Exam 1 Version 2 Answer Key...

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