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3 years ago

Explain why cells need to supercoil their dna molecules

1 answer:

5 0

DNA supercoiling means under or over winding of the DNA strand and basically is to become more condensed and more organized. Supercoiling is very important as it compacts the genetic code and as if that was not enough supercoiling also regulates and oversees the access the the genetic code.

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Why don't red blood cells pop in the bloodstream?

kirza4 [7]

Red blood cells do not pop in the bloodstream because of the osmosis, a specialized case of diffusion . Osmosis is the movement of water through a selectively permeable membrane from a region of its higher concentration to a region of its lower concentration.

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3 years ago

Read 2 more answers

What ion do acids release in solution?

Naya [18.7K]

Answer : Hydrogen.......:

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3 years ago

Bacteria and other microbes can be used to "clean up" an oil spill by breaking down oil into carbon dioxide and water. Two sampl

aksik [14]

Answer:

For sample A, A=17.7 %, T=17.7 %, G=32.30%, C=32.30%

For sample B, A= 28.9%, T=28.9%, G= 21.10%, C= 21.10%

Explanation:

The composition of nitrogenous bases in DNA is calculated using the suggestions proposed by the results of the experiment performed by Erwin Chargaff.

He found that in a DNA sample the composition of purine to pyrimidine is 1:1. This indicates that the amount of purine equals pyrimidine. This can be presented as purines + pyrimidines= 100. Also, adenine binds thymine and cytosine binds guanine.

In the given question,

For sample A

A= 17.7 %, Therefore, thymine will be = 17.7 %,

A+T= 35.40%

Now, G+C=100- 35.40%

G+C= 64.60%

content of G= 64.60/2= 32.30%

content of C= 32.30%

For sample B

T=28.9%, A will be= 28.9%

A+T= 57.80%

G+C=100-57.80%

G+C= 42.20%

Thus content of G will be= 42.20/2=21.10

content of C= 21.10%

Thus,

For sample A, A=17.7 %, T=17.7 %, G=32.30%, C=32.30%

For sample B, A= 28.9%, T=28.9%, G= 21.10%, C= 21.10%

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3 years ago

the site of atapuerca in northern spain is one of the most important fossil hominin sites in europe. identify what the following

Temka [501]

There have be found some fossils of ancient remains over the years. What the fossils from Atapuerca revealed about the hominins living in Europe at this time is below:

The Skull is known to show Interbreeding that took place with neandertals and their relatively healthy population.

The Fragment shows that there was a possibility of cannibalism in that area.

It shows that possible cannibalism took place as there were Cutmarks on various hominin bones found at Atapuerca mirror.

The relatively healthy population was found out through the study of the dentition of the Atapuerca hominins by anthropologists. It gave them a view into their diet and overall health.

The interbreeding with the Neandertals was shown through the Nuclear DNA that was gotten from bones and teeth of bones found at Sima de los Huesos

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3 years ago

Which type of gland produces hormones? which type of gland produces hormones? unicellular exocrine glands holocrine glands endoc

goblinko [34]

Which type of gland produces hormones? which type of gland produces hormones? unicellular exocrine glands halocline glands endocrine glands multicellular exocrine glands?

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