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kati45 [8]
3 years ago
6

I will give 5 stars, thanks and brainliest!! :)

Biology
1 answer:
irina [24]3 years ago
4 0

Answer:

Explanation:

  • the drugs are first tested through human cells which then many of the substances fail this test
  • Then the drugs are then taken to animals for further testing
  • Once the test on animals is over, health voluteers then aid scientists or chemists in checking whether the drugs are good for humans or not
  • I REALLY HOPE THIS WAS USEFUL TO YOU
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Quick answer: Cold front

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Cold fronts are less likely to be humid and carry rain clouds. Hope this can help you!

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The given blank can be filled with cells.

The extracellular matrix is the protective tissues present as a coating of the cells. Both animals as well as the plant cells have the extracellular matrix, this coating provides support, biochemical protection and mechanical protection from the external environment of the cells. In the plant cells, the cell wall is a type of extracellular matrix.

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The fluoride is what helps you avoid cavities

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An experiment was done by Gierer and Schramm where they exposed plant tissue to purified RNA from tobacco mosaic virus, and the
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See the answer below

Explanation:

A DNase is also known as deoxyribonuclease and it is an enzyme that catalyzes the degradation of deoxyribonucleic acid by cleaving the phosphodiester linkage in their structures. Thus,<em> if the RNA is treated with a DNase before the plants are exposed to it, it will not make any difference. The plants will develop the same types of lesions as if they have been exposed to the mosaic virus.</em>

Unlike DNase, RNase is a ribonuclease, an enzyme that is capable of carrying out catalytic degradation of ribonucleic acids. <em>This means that if the RNA is treated with RNase before the plants are made to be exposed to it, they will not develop the lesions because the RNA would have been degraded by the enzyme.</em>

A protease is an enzyme that degrades the structure of proteins. <em>Treating a RNA with protease will thus have no effect on the structure of the RNA. Exposing the plants to the protease-treated RNA will make no difference. The plants will still come down with the lesions as if they have been exposed to the virus. </em>

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