DNA.mutation.technology.docx

In order for an animal that was cloned from its

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37. In order for an animal that was cloned from its mother to grow and develop normally, it must have received a. half of its mothers DNA sequences b. Half of its father’s RNA sequences c. all of its mother’s RNA sequences d. all of its father’s DNA sequences e. all of its mother’s DNA sequences 38. The Bt protein produced in the bacterium Bacillus thuringiensis, kills corn earthworms that ingest the bacillus. If the Bt gene were transferred to corn so that the corn could express the Bt protein, which of the following would be the expected to occur when corn earthworms eat the corn? I. Corn earthworms that eat the Bt corn would be killed II. Bacillus bacteria that infect the Bt corn would be killed III. The corn earthworms would incorporate the Bt gene into their chromosomes a. I only b. II only c. III only d. I and III only e. II and III only 39. Which of the following is/are true regarding DNA replication? I. DNA replication is semiconservative II. DNA replication occurs during prophase III. DNA synthesis occur in 3 ‘ to 5 ‘ IV. Purines hydrogen-bond to pyrimidines
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a. I and II only b. I,II and III only c. I, III and IV only d. I, II, III and IV e. I and IV only 40 . An important process that occurs during sperm formation in diploid organisms is A. Fertilization B. Cloning C. Meiosis D. Parthenogenesis E. Gastrulation 41. Which of the following statements most accurately describes a basic difference between mitosis and meiosis? a. Homologous chromosomes form tetrads in mitosis but not in meiosis b . Homologous chromosomes form tetrads in meiosis but not in mitosis c. The nuclear membrane disappears in mitosis but not in meiosis d. A spindle forms in mitosis but not in meiosis e. A spindle forms in meiosis but not in mitosis 42. 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. synthetize proteins, lipids and carbohydrates e. increases genetic variety 43. Crossing over occurs in this phase. a. Anaphase I b. Prophase I c. Anaphase II d. Prophase II e. Metaphase I 44. Homologous chromosomes separate in this phase. a. A naphase I b. Prophase I c. Anaphase II d. Prophase II e. Metaphase I 45. Sister chromatids separate in this phase. a. Anaphase I b. prophase I c. Anaphase II d, Prophase II e. Metaphase I 46. If a somatic cell in a diploid organism contains ten pairs of chromosomes, What is the total number of chromatids that are present in the cell after the DNA has replicated but before mitosis has taken place? a. 10 b. 20 c. 30 d. 40 e. 80 47. Which of the following represents the correct sequences of events that occurs within a cell during mitosis I. the chromosomes migrate to opposite poles of the cells II. The nuclear membrane disappears III. The chromosomes line up along the equator of the cell IV. The chromatids of each chromosome separate a. I ,II ,III ,IV b. I, II, IV, III c. II, III, I , IV d. II, III, IV, I e. III, IV, II, I 48. In male mammals, meiosis takes place in the …..
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