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Leviafan [203]
3 years ago
8

1. Choose the graph that correctly represents the relationship of nucleotides in DNA and support

Biology
1 answer:
telo118 [61]3 years ago
8 0
Graph B, because the percentages between G and C are equal. Chargaff’s rule states that G = C and T = A. The graph correctly demonstrates this.
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Which of the following investigators was (were) responsible for the following discovery? In DNA from any species, the amount of
Zarrin [17]

Answer :Erwin Chargaff   a Biochemist

Explanation:

He formulated the base paring of double helix of DNA. He reasoned that since the percentage of four  DNA  bases are of this proportions in human;

                                  Adenine=30.9% and Thymine =29.4%;

                                  Guanine=19.9% and Cytosine =19.8%

Then,  the amount of adenine will always be equal to thymine,

And the amount of Guanine equals to cytosine based on this percentages of distribution.  

(Adenine and Guanine are large, molecule of Purines, while thymine and Cytosine are Pyrimidine)  

 

He concluded (although scientist believed, he did not explicitly stated this) that this should be the base paring patterns in DNA molecule. This is the first Chargaff Rule.

His second rule is that the DNA composition, in the relative amount of the four bases Adenine, Thymine, Cytosine and Guanine varies in proportion from one organisms to another. And this is the basis of molecular diversity.

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How many protons are in an atom krypton
gayaneshka [121]
I think there’s is 36 protons
4 0
3 years ago
What is it called when scientists examine how well other scientist follow the scientific method?
Phoenix [80]
I think the answer you are looking for is peer review.
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A plant can produce either purple flowers or white flowers. What is the probability of purple-flowered offspring if two plants t
pickupchik [31]

Answer:

it should be 4:4

Explanation:

The p will stand for purple and the w will stand for white.

it would go like     P    |    P

                       W | PW | PW

                       W | PW | PW

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The organisms that create all the usable food energy on Earth are called the producers. These organisms are able to produce food through the different resources such as the energy from the Sun, the carbon dioxide, and water and minerals that they absorb from the soil
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