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Nata [24]
3 years ago
15

1. What are Chargaff's rules?

Biology
1 answer:
kotegsom [21]3 years ago
7 0

1)Chargaff's rules state that DNA from any cell of any organisms should have a 1:1 ratio of pyrimidine and purine bases and, more specifically, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine. This pattern is found in both strands of the DNA.

2)DNA structure

DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code.

3)A nucleotide consists of three things: A nitrogenous base, which can be either adenine, guanine, cytosine, or thymine (in the case of RNA, thymine is replaced by uracil). A five-carbon sugar, called deoxyribose because it is lacking an oxygen group on one of its carbons. One or more phosphate groups.

4)DNA replication is said to be semi-conservative because of this process of replication, where the resulting double helix is composed of both an old strand and a new strand. ... Semiconservative replication would produce two copies that each contained one of the original strands and one new strand.

5)The diagram has show in above.

6)complementary base pairing is necessary because the double helix shape would not be the same if not. Doubles would only pair with doubles and the singles to singles.

<u>HOPE</u><u> </u><u>THIS</u><u> </u><u>HELPS</u><u> </u><u>YOU</u><u>.</u>

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6 0
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1. <br> A) Name the 4 MAJOR ORGANIC COMPOUNDS.<br><br> B) DESCRIBE how they DIFFER in their uses.
nlexa [21]

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8 0
3 years ago
Order the parts of the digestive system to trace the path of a bolus of food from ingestion to excretion. Use the correct answer
n200080 [17]

Answer:

A) Food enters the mouth

B)  Esophagus

C)  Stomach

D)Cecum

E) Feces is expelled

Explanation:

The food is ingested through the mouth and and then it is transported through the esophagus to the stomach from where it reaches the small and large intestine and then it is finally expelled as undigested or waste foo product.

Based on the above brief explanation, the flow chart depicting food movement are as follows -

a) Food enters the mouth

b) Esophagus - known as the food pipe

c) Stomach

d)Cecum - it is a small pouch connected to small and large intestine.

e) Feces is expelled through rectum

6 0
3 years ago
If 10.0 mL of blood plasma has a mass of 10.279 g and contains 0.870 g of protein, what is the mass/mass percent concentration o
Maru [420]

Answer:

Mass/mass percent concentration means the mass of the solute/mass of the solution times 100. You know both the mass of the solute (0.870 g protein) and the mass of the solution (10.279 g solution). So divide and multiply your result by 100.  (0.870 / 10.279 * 100)

Explanation:

7 0
3 years ago
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