| 21. | Problems in obtaining large amounts of proteins encoded by recombinant genes can often be overcome by using |
| a. | BACS |
| b. | expression vectors |
| c. | YACS |
| d. | all of these |
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Answer: (b).expression vectors
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| 22. | Agrobacterium tumefaciens is |
| a. | a disease in humans that causes loss of sight |
| b. | a bacterium that can be used to introduce DNA into plants |
| c. | a fungi that is used to produce antibiotics in large amounts |
| d. | a disease in humans that causes loss of weight |
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Answer: (b).a bacterium that can be used to introduce DNA into plants
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| 23. | In genetic engineering, a chimera is |
| a. | an enzyme that links DNA molecules |
| b. | a plasmid that contains foreign DNA |
| c. | a virus that infects bacteria |
| d. | a fungi |
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Answer: (b).a plasmid that contains foreign DNA
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| 24. | Human insulin formed by recombinant DNA technology is known as |
| a. | H insulin |
| b. | R insulin |
| c. | humulin |
| d. | huinsulin |
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Answer: (c).humulin
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| 25. | The gene coding for VP1 is cloned in |
| a. | pMB 9 |
| b. | pBR 322 |
| c. | pUC 18 |
| d. | pUC 19 |
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Answer: (b).pBR 322
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