Exam%201%20Bios%20100%20Fall%202009%20safe - Bios 100 Fall...

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Bios 100 Fall 09 Exam 1 Match the structure and / or protein with the functions / properties: A. peroxisome B. rough endoplasmic reticulum C. catalase D. lysosome E. mitochondria 1. contains their own chromosome 2. breaks down proteins and other macromolecules 3. can convert 10 6 molecules of H 2 0 2 to H 2 0 per second 4. organelle where H 2 0 2 is converted to H 2 0 5. involved in the manufacture of proteins 6. If the Golgi apparatus of a cell is disrupted and not functioning properly, A. acidic enzymes will pour into the cell cytoplasm causing considerable damage B. DNA will no longer be able to encode RNA C. RNA will no longer be able to encode proteins D. Secretion of proteins such as insulin would likely be significantly disturbed E. Removal of sugars from proteins and their consequent breakdown would be inhibited. A cell that produces many proteins to be secreted is exposed to the amino acid lysine that has been made radioactive. The amino acid is added for a very short period of time and then washed away. Where would the radioactive compound be detected 7. 30 seconds afterwards? 8. 7 minutes afterwards? 9. 50 minutes afterwards? A. cell nucleus B. rough endoplasmic reticulum C. secretory vesicles on the trans side of the Golgi apparatus D. secretory vesicles close to the outer membrane of the cell E. lysosome 10. Which of the following is NOT true for secreted proteins? A. They are synthesized by ribosomes B. They are transported through the endomembrane system in membrane- bound transport organelles C. They are transported from the Golgi apparatus to the endoplasmic reticulum D. They contain a signal sequence that thrects them into the endoplasmic reticulum E. None of the above.
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11. Propose a function for cells that contain extensive rough endoplasmic reticulum A. production and processing of fatty acids and other lipids B. movement of the cell by cell crawling C. storage of large amounts of starch D. production of large amounts of muscle proteins after exercise E. none of the above 12. Procaryotes do not have which of the following? A. Chromosomes B. DNA C. Nucleus D. cell membrane E. ribosome 13. Which of the following best describes the nuclear envelope? A. It is continuous with the endoplasmic reticulum B. It is continuous with the nucleolus C. it is continuous with the plasma membrane D. it contains a single membrane E. it is composed mostly of polysaccharides 14. The production of mRNA involves which process? A.
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Exam%201%20Bios%20100%20Fall%202009%20safe - Bios 100 Fall...

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