F09 Bio1010 Exam Microbiology

Bacteria do not possess chromosomes bacteria have

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Unformatted text preview: es not occur in living plants because the structure of the chloroplast prevents oxygen from binding to rubisco. C. Photorespiration takes place in the cytoplasm, and carbon fixation takes place in the chloroplast. D. Photorespiration does not require energy, so it does not affect the efficiency of photosynthesis. E. Photorespiration takes place in the mitochodria while photosynthesis is underway. Figure 3 16. Which numbers in the above figure correspond to regions where you would expect a high concentration of protons? A. B. C. D. E. 1 and 3. 2 and 4. 1 and 4. 2 and 3. 2 and 5. 6 17. Which of the following statements does NOT describe what occurs in meiosis I? A. B. C. D. E. 18. Bacteria with circular chromosomes do not produce/require telomerases. This is because A. B. C. D. E. circular molecules have no end. bacteria do not possess chromosomes. bacteria have different DNA polymerase enzymes. bacteria lack ribosomes. bacteria can lose many hundreds of genes over a lifetime without ill ­effect. Crossing over of non ­sister chromatids occurs. Tetrads migrate to the metaphase plate. Sister chromatids separate and begin moving to opposite sides of the cell. Homologous chromosomes separate and begin moving to opposite sides of the cell. Overall chromosome number is reduced. 19. Choose the option that best represents the largest → smallest order: A. B. C. D. E. Gene, genome, chromosome Chromosome, gene, genome Genome, chromosome, gene. Chromosome, genome, gene Genome, gene, chromosome 20. Which of the following is true regarding cancer? A. While cancer can occur in different regions of the body, it is considered a similar disease in terms of pathology and treatment. B. Cancer involves uncontrolled cell division. C. Most cancers are the result of a single mutation. D. Cancer involves the interference with tumour suppressor genes by proto ­oncogenes. E. More than one of the above statements in A through D is true. 21. Pepsin, a digestive enzyme that degrades proteins in the stomach, is synthesized as pepsinogen and converted to active pepsin in the stomach by the removal of several amino acids. The activation of pepsin is an...
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