Fall 07 120 Exam_2_questions

Fall 07 120 Exam_2_questions - ` Professor Webb Name:_ Exam...

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` Exam Two Professor Webb 10/31/2007 Name:_________________________ Class time:___________________ 1 BISC 120L Midterm 2 – Fall 2007 – 100 pts total READ ALL INSTRUCTIONS CAREFULLY 1. Write your name on all the pages 2. Make sure you have a total of 11 pages Page # Score Please check the box next to your TA ʼ s name : Laila Barada YounKyoung Kim Gorjana Bezmalinovic Lori Klaidman Carlos Cabrera Mimi Lee Prithiviraj Chellamuthu Xuecong Liu Abdoulaye Galbani Kun (Mark) Qian Lewis Hsu Chanpreet Singh Rishabh Jain Natalia Tjokro Soyun Kim 1 0_ /0 pts 2 _____/10 pts 3 _____/10 pts 4 _____/10 pts 5 _____/10 pts 6 _____/10 pts 7 _____/4 pts 8 _____/10 pts 9 _____/8 pts 10 _____/14 pts 11 _____/14 pts Total _____/100 pts
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` Exam Two Professor Webb 10/31/2007 Name:_________________________ Class time:___________________ 2 Part I. Multiple Choice: Select the most appropriate answer and write in CAPITAL LETTERS ONLY in the accompanying box (2pts each). 1) In the 70 ʼ s, Carl Woese of the University of Illinois and his collaborators identified two major branches of prokaryotic evolution. What was the basis for dividing prokaryotes into two domains? A) microscopic examination of staining characteristics of the cell wall B) metabolic characteristics such as the production of methane gas C) metabolic characteristics such as chemoautotrophy and photosynthesis D) molecular characteristics such as ribosomal RNA sequences E) ecological characteristics such as the ability to survive in extreme environments 2) How many half-lives should have elapsed if 12.5% of the parent isotope remains in a fossil at the time of analysis? A) one B) two C) three D) four E) five 3) The host range of a virus is determined by A) the proteins on its surface. B) whether its nucleic acid is DNA or RNA. C) the proteins on the surface of the host cell. D) the enzymes produced by the virus before it infects the cell. E) both A and C 4) Viruses with single-stranded RNA that acts as a template for DNA synthesis are known as A) retroviruses. B) proviruses. C) viroids. D) bacteriophages. E) lytic phages.
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` Exam Two Professor Webb 10/31/2007 Name:_________________________ Class time:___________________ 3 5) The vegetative (nutritionally active) bodies of most fungi are A) composed of hyphae. B) referred to as a mycelium. C) diplomonads D) A and B only E) A, B, and C 6) The HIV virus causes the human disease AIDS. All of the statements below are true, except A) HIV is a retrovirus. B) HIV lyses the cells when it departs. C) the virally-encoded enzyme reverse transcriptase is a required.
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This note was uploaded on 04/12/2009 for the course BISC 120 taught by Professor Webb,wetzer,? during the Fall '07 term at USC.

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Fall 07 120 Exam_2_questions - ` Professor Webb Name:_ Exam...

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