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3 years ago

Predict the most likely outcome of culturing transformed E. coli in the presence of tetracycline.Justify your prediction.

Biology

1 answer:

My name is Ann [436]3 years ago

4 0

Answer:

E.coli is a bacterium which is preffered for transformation due to its rapid growth and high efficiency of introduction of DNA molecules into cells.

Tetracycline is an antibiotic used to treat several infections such as cholera, plague, brucellosis, and malaria etcetra.

Plasmid is a small, extrachromosomal DNA molecule present in cell which is seprated from chromosomal DNA and have ability to replicate independently.

When a plasmid resistant to tetracycline and kanamycine is inserted into E.coli, the process is called transformation. E.coli might not be able to survive due to absence of plasmid but the transformed strains having antibiotic tetracycline and kanamycine will probably be able to survive it.

Hence, the culture of bacteria carrying plasmid will be able to survive only.

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The mass of a nucleus is less than the total mass of its nucleons. This difference in mass indicates that some of the mass has b

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Answer:

Option B , Binding Energy

Explanation:

The energy in combining two nucleus is lost in binding them. This binding energy is too large that it causes significant loss of mass and is calculated using the Einstein’s theory of relativity.

When two nucleons combine , mass defect is caused which leads to loss of mass associated with energy and therefore the mass of nucleus is less than the mass of nucleons.

Hence, Option B is correct.

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2 years ago

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A germinating seed. This is due to the fact that the cells of a germinating seed are actively dividing as the plumule and radicle grow. This growth requires energy and this is derived from cellular respiration of the stored food in the cotyledons.

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2 years ago

List the 3 main types of heat transfer.

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Answer:

conduction convection and radiation

Explanation:

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2 years ago

The rungs of the DNA ladder are made from

coldgirl [10]

The "rungs" of the DNA strand are made up of nitrogenous bases.

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2 years ago

Ecosystem stability can be a factor of species diversity within a community. Which letter above would indicate the stage of succ

PolarNik [594]

Answer:

C) Letter C because the emergence of a mature forest will resist changes to the ecosystem with the greatest success.

Explanation:

Ecosystem stability can be a factor of species diversity within a community. Which letter above would indicate the stage of success in an ecosystem that represents the greatest potential for stability and resilience?

A) Letter A because light levels are high and will promote the greatest growth of primary producers.

B) All letters represent equal opportunity for stability as the area of land does not change over time.

C) Letter C because the emergence of a mature forest will resist changes to the ecosystem with the greatest success.

D) Letter B because aspen, spruce, and pines can provide the most opportunity for primary consumers to hide from their predator species

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2 years ago