OBJECTIVE LIFE SCIENCE
BIOTECHNOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Bacteria do not have cell vacuoles
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Bacteria do not have mitochondria
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Bacteria have cell walls
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Bacteria share their genetic code with all other organisms
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Detailed explanation-1: -Bacteriaare useful to genetic engineering as they reproduce very rapidlybut still have the ability to produce complex molecules. Bacteria contain plasmids, which are circular rings of DNA, into which new genes can be inserted, removed or changed.
Detailed explanation-2: -Using restriction enzymes, scientists can cut and paste together DNA from different species. For example, by cutting and pasting the gene for human insulin into bacteria, we can use the bacteria as biofactories to produce insulin for diabetic patients.
Detailed explanation-3: -All known living organisms use the same genetic code. This shows that all organisms share a common evolutionary history. The genetic code is unambiguous. Each codon codes for just one amino acid (or start or stop).
Detailed explanation-4: -Escherichia coli is the widely used bacterium in genetic engineering due to the following reasons: It has a generation time of 20 minutes. Easy to culture.