--- is used as a vector for cloning into higher organisms.
Correct answer: A. Retrovirus
- A. Retrovirus
- B. Baculovirus
- C. Salmonella typhimurium
- D. Rhizopus nigricans
Explanation
Retroviruses can be modified to carry genes into higher-organism cells because their normal life cycle includes entry into host cells and integration of their genetic material. Baculovirus may be chosen because it is also used as a vector, but it is mainly associated with insect-cell expression systems.
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Biotechnology applies genetic engineering, cell culture and recombinant DNA methods to medicine and public health. The material includes production of insulin, vaccines and antibiotics, diagnostic techniques, gene therapy, genetically modified organisms and the ethical concerns surrounding manipulation of human genes.
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