Replication of RNA genome in RNA virus does not involve proofreading. Thus RNA viruses have higher rates of mutation. So the correct option is B.
<h3>What is meant by proofreading? </h3><h3> </h3>
There are a variety of mechanisms in the cell to prevent mutations. Thus, permanent changes in the DNA sequence are prevented.
During the process of synthesis of DNA, DNA polymerases can analyse any mistake made during the synthesis and fix it. The majority of mispaired bases can be fixed by this process. It is called proofreading.
This process is not present in RNA and RNA polymerases. Thus RNA viruses appear to have higher rates of mutation compared to DNA viruses.
Therefore the correct option is B.
Read more about RNA viruses, here
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Answer:
neither end of Earth’s axis is tilted toward or away from the sun
Explanation:
Answer:
Protein contributes 10 to 35% of the total calories, fat contribute 20-35 % of total calories and carbohydrate contributes 45-60% of total calories.
Explanation:
National academy of science comes up with the dietary recommendation every year since year 1941. These dietary recommendations include the assessment of nutrient-based values of any diet.
One of the key methods is to assess the amount of calories contributed by each food components i.e protein, carbohydrate and fat.
This method defined calorie ranges which are known as Acceptable Macronutrient Distribution Ranges.
Protein contributes 10 to 35% of the total calories, fat contribute 20-35 % of total calories and carbohydrate contributes 45-60% of total calories.
Answer:
Explanation:
Distal Region of the Radius
In the medial surface, there is a concavity, called the ulnar notch, which articulates with the head of ulna, forming the distal radioulnar joint. The distal surface of the radius has two facets, for articulation with the scaphoid and lunate carpal bones.