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Alex787 [66]
3 years ago
7

Why is it necessary to re-circularize a plasmid prior to transformation into cells?

Biology
1 answer:
Anuta_ua [19.1K]3 years ago
8 0
It is necessary to use a plasmid instead of linear DNA in transformation (into bacteria) because some bacteria such as E. coli will recognize linear DNA as invading bacteriophage DNA and degrade it instead of being taken up. The bacteria that are naturally competent can actually use linear DNA by degrading one strand and adding the other strand to their genomic DNA. 
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Which statements describe film badges? check all that apply. an amplifying device that indicates the presence of ionizing partic
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Answer:

film sensitive to radiation that is removed and developed to measure exposure.

a device used for monitoring individual cumulative exposure to ionizing radiation.

Explanation:

Film badges are monitoring devices that contain photographic film which measures and record the wearer’s exposure to different ionizing radiation such as X-rays, gamma rays and beta particles. The photographic film within film badges is very sensitive, functions as a detector, and is enclosed in a vapor and light resistance cover which disallows chemical vapors, light or moisture to have an effect on the film. Film badges give a lasting radiation record and it can also differentiate between different energies of photons.

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I need the mega big super ultra ultimate super smash bros help​
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D. No mutation can occur

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In the block to polyspermy, entry of the sperm's contents causes ________ levels in the oocyte's cytoplasm to rise, triggering t
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In the block to polyspermy, entry of the sperm's contents causes calcium ion levels in the oocyte's cytoplasm to rise, triggering the cortical reaction.

In biology, polyspermy describes the fertilization of an egg by more than one sperm. Diploid organisms normally contain two copies of each chromosome, one from each parent.

The cell resulting from polyspermy, on the other hand, contains three or more copies of each chromosome—one from the egg and one each from multiple sperm. Usually, the result is an unviable zygote. This may occur because sperm are too efficient at reaching and fertilizing eggs due to the selective pressures of sperm competition.

The cortical reaction is a calcium-dependent exocytotic process in which the content of secretory granules is released into the perivitellin space immediately after fertilization, which serves to prevent polyspermic fertilization.

Learn more about  polyspermy here : brainly.com/question/4537960

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1 year ago
Do venus fly traps have to be in direct sun light or shade
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I hope this helps!
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