THE MOLECULAR BASIS OF INHERITANCE
RECOMBINANT DNA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Turn to blue colony
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Turn to purple colony
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Died
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Turn to white colony
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Detailed explanation-1: -Bacteria without the plasmid are less likely to survive and reproduce. Some plasmids take extreme measures to ensure that they are retained within bacteria. For example, some carry a gene that makes a long-lived poison and a second gene that makes a short-lived antidote.
Detailed explanation-2: -The answer is that bacterial cells can exist without plasmid DNA. The term “plasmid” refers to the extrachromosomal genetic component of the bacterial cell that is distinct from chromosomal DNA. These are little double-stranded, circular DNA molecules with the ability to replicate on their own.
Detailed explanation-3: -What would happen to a bacteria with no plasmids that was put into a low-stress environment, and why? The bacteria would grow, but just very slowly. The bacteria would not be able to reproduce, because it is located on plasmids.
Detailed explanation-4: -The bacterium cannot grow in the presence of the antibiotic ampicillin unless it contains the plasmid, and so there will be no growth on the LB/Amp plate of the bacteria without the plasmid.