Biology exam 2

Biology exam 2 - BLY 121- Exam 1 Covering Chapter 7-12...

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BLY 121- Exam 1 Covering Chapter 7-12 C. S. Major Fall 2005 Chapter 7 1. Which of the following represents a major difference between prokaryotic cells and eukaryotic cells? A. Prokaryotes, not eukaryotes, have cell walls. B. Eukaryotic cells have a membrane bound nucleus, tend to have a much more extensive inner membrane system, and a larger numbers of intracellular organelles than do prokaryotes. C. Prokaryotes are unable to carry out aerobic respiration, a process that requires a complex inner-membrane system. D. Prokaryotes are a more homogenous group of organisms than are eukaryotes, which include protozoa, plants, and animals. 2. What is the function of the nuclear pore complex? A. regulates movement of materials across the nuclear membrane B. assembles ribosomes from raw materials that are synthesized in the nucleus C. communicates with components of the endomembranal system D. synthesizes and repairs DNA, the unit of genetic information 3. What path does a protein in the secretory pathway take, starting from the site of its synthesis? A. Rough ER, secretory vesicles, Golgi apparatus, plasma membrane B. Golgi apparatus, rough ER, secretory vesicles, plasma membrane C. Plasma membrane, secretory vesicles, Golgi apparatus, rough ER D. Rough ER, Golgi apparatus, secretory vesicles, plasma membrane 4. Which of the following statements is a fundamental difference between plant and animal cells? A. Plant cells do not have mitochondria. B. Plant cells do not have a Golgi apparatus. C. Animal cells do not have cell walls. D. Animal cells do not possess chromatin. 5. Where are proteins synthesized? A. ribosomes B. chloroplasts C. smooth ER D. nucleus 6. Which of the following cytoskeletal proteins are involved in changing cell shape or in cell movement? A. microtubules B. microfilaments and myosin C. microfilaments, microtubules, and intermediate filaments are all important in any processes involving cell movement D. intermediate filaments Chapter 8 7. Cells interact with other cells and their environment through the action of their: A. plasma membrane and extracellular matrix B. microtubular tracks C. Golgi apparatus 1
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D. intracellular electrical currents 8. Transport of materials across a cell membrane: A. is an energy-requiring process regardless of the chemical properties of the substance being transported B. always takes place from a region of greater concentration to a region of lesser concentration C. is selective D. requires a carrier molecule in the membrane 9. In order for a tissue or an organ to function as a unit: A. There must be a signal molecule to which all cells in the tissue or organ can respond. B. There must be cell-cell communication among the cells within a tissue or organ.
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This note was uploaded on 04/29/2008 for the course BLY 120 taught by Professor Major during the Fall '07 term at S. Alabama.

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Biology exam 2 - BLY 121- Exam 1 Covering Chapter 7-12...

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