key_exam3b_f08-1

key_exam3b_f08-1 - BIOLOGY 2A UCD FALL 2008 B EXAM 3...

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B IOLOGY 2 A E XAM 3 UCD F ALL 2008 B G ERHART S TUDENT N AME ______________ ___________________________________________ ID _____________________________________________________________________ Instructions (4 points): Fill in your name and student ID number on the scantron and the first and last pages of your exam booklet . Be certain that the bubbles of the scantron are filled in with your ID number and the correct version of your exam (found at the end of the Multiple Choice questions). Mark your scantron! Mark the last page (multiformat page) in PEN (answers recorded in pencil will be accepted, but can not be submitted for re-grading). Tear off the last page and turn it in separately from the scantron. B EST OF L UCK ON THE E XAM ! Scoring: Multiple choice (32 questions @ 2.5 points each) = 80 points + Multi-format page (16 points) + following directions (4 pts) __________________________________________________ = 100 points possible
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Choose the one best answer to each question, unless specifically told to choose two answers. 1. Which would most easily diffuse directly through a membrane? A. N 2 B. Sodium ions C. Phosphate D. A nucleotide E. A positively charged amino acid 2. How do gram negative bacteria access resources in the environment? A. Endocytosis B. Diffusion through porins in the outer membrane C. Active transport through proteins in the outer membrane D. Adsorption of materials to the cell wall E. Extension of pili to absorb nutrients 3. For bacteria, ‘sex’ and reproduction … Choose TWO answers … A. are simultaneous B. occur through conjugation and binary fission, respectively C. are separate D. occur through meiosis E. involve many genders 4. In a lateral gene transfer A. Genes are transferred from parent to offspring B. Genes can be transferred between distantly related species C. The information is carried by protein instead of nucleic acid D. Only the genes that the receiver would find useful are transferred E. Only the genes that the donor no longer needs are transferred 5. The large volume of a eukaryotic cells is possible because the cell A. is not affected by any changes in surface area to volume ratio B. uses internal membranes to increase surface area C. uses the cytoskeleton to transport materials D. is always cooperating with other cells E. Both B and C 6. Which is the best explanation for why bacteria have remained simple? A. bacteria with small genomes can divide faster B. bacteria have limited ability to respire across their membranes C. bacteria haven’t been around long enough to get complicated D. there’s just no advantage to being big and complicated E. evolution doesn’t work on bacteria
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7. What contributes MOST to the genetic diversity within a population of bacteria? A.
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This note was uploaded on 02/03/2010 for the course BIS 2A taught by Professor Grossberg during the Spring '08 term at UC Davis.

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key_exam3b_f08-1 - BIOLOGY 2A UCD FALL 2008 B EXAM 3...

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