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Anna71 [15]
3 years ago
10

Recall the three discoveries Erwin Chargaff made while studying DNA: the total amount of pyrimidines (T+C) equals the total amou

nt of purines (A+G), the amount of T equals the amount of A, and the amount of G equals the amount of C. These three "rules" led to what conclusion(s) about DNA base pairing?
A purine base pairs with a pyrimidine base.

A pairs with T.

G pairs with C.

All of the answer options are correct.

None of the answer options is correct.
Biology
1 answer:
mylen [45]3 years ago
3 0

Answer:

All of the answer options are correct.

Explanation:

Chargaff contributed in understanding the structure and composition of DNA with his discoveries. He discovered that purine and pyrimidine bases are in equal amounts in a DNA molecule. He also discovered that amount of Adenine base (A) is equal to amount of Thymine base (T). It means that A pairs with T. Since A is a purine and T is a pyrimidine it also implies that purine base pairs with a pyrimidine base. This conclusion can also be arrived by taking in consideration the other base pair which is G (purine) and C (pyrimidine).

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Which of the following would be LEAST likely in the fossil record? Which of the following would be LEAST likely in the fossil re
GREYUIT [131]

Answer:

The correct answer is desert-dwelling species.

Explanation:

Any preserved remains, trace or impression of anything, which was once living in the past is termed as a fossil. The examples of fossils comprise stone imprints of microbes or animals, bones, exoskeletons, shells, coral, remnants of DNA, the substances getting preserved in amber, and others.  

For the formation of fossils, the most essential condition is decomposition that takes place gradually, that is, at a slow pace. Thus, places like wet marshy areas will be the locations where the maximum of the fossils can be found as such places provide optimum conditions for slow mineralization and decomposition of bones.  

On the other hand, places like deserts would be the least likely to have a fossil record as deserts are devoid of optimum conditions required for the formation of fossils. In places like a desert, decomposition and demineralization of the components like bones take place at a brisk rate.  

5 0
3 years ago
Define virus and virion, and describe the parts of a virion.
leva [86]

Answer:

A virus is a tiny infectious biological agent that can only replicate or duplicate inside the host cell. These infectious agents can infect all different types of living organisms ranging from animals and plants to microorganisms and archaea and bacteria.

Virions are ineffective particle or form of the virus outside of the host cell, with RNA or DNA and a protein capsid.

The main role of these infectious agent virions is to transfer the DNA or RNA genome from itself to the cell of host and expressed the gene which means produce proteins from the genome transferred to the host cell.

6 0
3 years ago
Mixing alcohol and prescribed medication is a good idea; this helps the medication get in your system faster, thus aiding in the
Mamont248 [21]
This is totally false, the combination of the two could result in overdose or possibly death.
Hope this helps you, please remember to say thanks.
5 0
4 years ago
In order for an ecosystem to be healthy is does not need to have different kinds of plants and animals.
soldier1979 [14.2K]

Answer:

false

Explanation:

biodiversity is crucial to a healthy ecosystem

7 0
2 years ago
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Alenkasestr [34]

Answer:

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Explanation:

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Thus, the correct answer is overconfidence.

8 0
3 years ago
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