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Chapter 9: Problem 29

The base composition of an RNA virus was analyzed and found to be \(14.1 \% \mathrm{~A}, 14.0 \% \mathrm{U}, 36.2 \% \mathrm{G}\), and \(35.7 \% \mathrm{C}\). Would you conclude that the viral genetic material is single- stranded RNA or double-stranded RNA?

Short Answer

Expert verified
Based on the analysis, it can be concluded that the RNA of the virus is likely double-stranded.

Step by step solution

01

Assess Adenine and Uracil balance

Adenine (A) was found to be 14.1% and Uracil (U) was found to be 14.0%. The difference between them \( |14.1 - 14.0| = 0.1% \) which is very minor. This suggest they are roughly equal.
02

Assess Guanine and Cytosine balance

Guanine (G) was found to be 36.2% and Cytosine (C) was found to be 35.7%. The difference \( |36.2 - 35.7| = 0.5% \) is insignificant which suggests a balance between them.
03

Conclude on the type of RNA

Since the amount of A is approximately equal to U, and the amount of G is approximately equal to C, it suggests that the viral genetic material follows a double-helix pattern and therefore it is most likely double-stranded RNA.

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Most popular questions from this chapter

Compare the structural features of a double-stranded RNA structure with those of a DNA double helix.

Within a protein, certain amino acids are positively charged (e.g., lysine and arginine), some are negatively charged (e.g., glutamate and aspartate), some are polar but uncharged, and some are nonpolar. If you knew that a DNA-binding protein was recognizing the DNA backbone rather than a base sequence, which amino acids in the protein would be good candidates for interacting with the DNA?

As the minor and major grooves wind around a DNA double helix, do they ever intersect each other, or do they always run parallel to each other?

An organism has a \(\mathrm{G}+\mathrm{C}\) content of \(64 \%\) in its DNA. What are the percentages of \(A, T, G\), and \(C\) ?

In what ways are the structures of an \(\alpha\) helix in a protein and the double helix of DNA similar, and in what ways are they different?
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