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malfutka [58]
3 years ago
12

) Imagine that you are studying a newly discovered bacteria from a hot spring in Yellowstone National Park. You examine the nitr

ogenous bases of this organism, and find that 10% of the nitrogenous bases in its DNA are adenine. What percentage of nucleotides are cytosine
Biology
1 answer:
ikadub [295]3 years ago
5 0

Answer:

Cytosine- 40%

Explanation:

DNA is the genetic material in virtually all living organisms. It is a molecule made up of long chains of nucleotides, which are its building block. Four types of nucleotides make up the DNA molecule viz: Adenine (A), Thymine (T), Guanine (G), and Cytosine (C).

According to Erwin Chargaff in his rule regarding DNA composition, he stated that in a DNA molecule, the amount of adenine must equal thymine while that of guanine must equal cytosine. In a nutshell, the total of all the base pair must equally be 100% i.e. (A + T) + (G + C) = 100%.

In this case where a newly discovered bacteria from a hot spring in Yellowstone National Park was found to contain 10% of adenine in its DNA. Since Adenine is 10%, Thymine base must also be 10% in accordance to Chargaff's rule.

Hence, 10% + 10% + (G + C) = 100%.

20% + G + C = 100%

G + C = 100 - 20

G + C = 80%

Since, G and C must be equal, then G = C = 80% ÷ 2 = 40%. This means that the percentage of cytosine will be 40%.

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The complete options to the question includes:

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Explanation:

Infectious diseases occurs when an individuals system is invaded by pathogenic microorganisms (virus,bacteria,fungi and parasite). These microorganisms may or may not cause disease but this depends on the healthy state of the host. They can also be transmitted from one person to another.

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