DNA.mutation.technology.docx

A prostate b epididymis c vas deferens d peritoneal

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a. prostate b. epididymis c. vas deferens d. peritoneal cavity e. seminiferous tubules
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49. The function of mitosis is to a. Replicate chromosomes b. Distribute one copy of each chromosome to each new cell c. Distribute half the diploid number of the chromosomes into each cell d. Synthesize proteins, lipids and carbohydrates e. Increases genetic variability 50. Which of the following best describes what’s meant by the term “diploid”? A. Containing double stranded DNA B. Containing one copy of each chromosomes C. Containing pairs of structurally similar chromosomes D. Containing pairs of chromosomes with identical DNA sequences E. Containing haphazardly arranged genes. 51. Which of the following is true about DNA and RNA in eukaryotes? A. DNA is found only in the nucleus; RNA is found only in cytoplasm B. DNA is energy storage compound ; RNA is used for replication of DNA C. DNA is typically single stranded; RNA is typically double stranded D. DNA contains uracil ; RNA contains thymine E. DNA is transcribed ; RNA is translated 52- 55 Refer to the experiment described below A sample of 0.1 milliliter of an Escherichia coli culture was added to each of 15 petri plates containing nutrient agar. Then 0.1 milliliter of sterile water was added to each of three plates and 0.1 milliliter of either solution of I,II, III or IV was added to the remaining plates as shown in the table below. The liquid was spread evenly over the agar and the plates were placed in an incubator at 37 °C. After a 48 hour period the number of colonies per plate was counted. No. of colonies per plate Solution Trial 1 Trial 2 Trial 3 Water only 348 295 311 Solution I 150 162 179 SolutionII 360 300 291 Solution III 30 16 36 Solution IV 200 195 207 52. Which of the following hypothesis was tested in this experiment? A. Some of the solutions will cause E. coli to mutate B. E. coli grows in Petri-plates as well as human C. Water is required for the growth of E.coli D. Some of the solutions will inhibit the growth of E- coli E. E-coli grows best at 37°C 53. The toxicity of the solution IV can be best determined by A. Comparing the average number of colonies grown on the solution IV plates with the average number grown on the solution II plates B. Comparing the average number of colonies grown on the solution IV plates with the average number grown on the plates to which only water was added C. Comparing the number of colonies on the solution IV plates across trial 1,2and 3 D. Measuring the overall size of the colonies on the solution IV plates E. Determining the average distance between the neighboring colonies on the solution IV plates. 54. On the basis of the experimental results, which solution might be most effective as a disinfectant against E-coli A. Solution I B. Solution II C. Solution III D. Solution IV E. Water 55. Which of the following is a valid interpretation of the results of the experiment?
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