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snow_tiger [21]
3 years ago
13

In blue-white screening, what do blue colonies represent?

Biology
1 answer:
Basile [38]3 years ago
3 0

Answer:

The correct option is : cells containing empty plasmid vectors

Explanation:

The blue-white screen is a technique which involves the rapid identification of the recombinant bacteria in a vector-based molecular cloning experiment. In this method, a DNA ligated vector is inserted in a host cell which is viable for transformation and grown in presence of X-gal.    

The cells that are transformed with the vectors having the recombinant DNA produce the white colonies. Whereas, the cells transformed with empty vector i.e. the non-recombinant plasmids, produce the blue colonies.

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<h3>What is a keystone species?</h3>

A keystone species is an organism whose existence defines an entire ecosystem such that them, the ecosystem would be severely affected or may not exist.

Trophic cascades are events which result in serious distortions in an ecosystem as a result of the removal or addition of a top predator.

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Learn more about keystone species at: brainly.com/question/2044051

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2 years ago
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scoundrel [369]

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3 years ago
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