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Chapter 9: Problem 27

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?

Short Answer

Expert verified
No, the minor and major grooves of DNA do not intersect each other; they always run parallel to each other.

Step by step solution

01

Understand DNA Structure

Certain fundamental aspects of DNA structure are necessary to answer this question. The DNA molecule is set up like a twisted ladder and contains two grooves- the major groove and the minor groove. These grooves are formed due to the twisting of the DNA double helix.
02

Analyze the Directions of the Grooves

The grooves run on the same direction as their respective chains on the DNA molecule. The major groove is the larger one while the minor groove is the smaller. Both grooves are found on the same side of the DNA double helix, and they parallel each other.
03

Conclude if Grooves Intersect or Run Parallel

In the structure of a DNA molecule, the minor and major grooves always run parallel to each other and never intersect, because they are formed by the twists of the same double helix.

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Most popular questions from this chapter

Draw the structures of guanine, guanosine, and deoxyguanosine triphosphate.

Make a side-by-side drawing of two DNA helices: one with \(10 \mathrm{bp}\) per \(360^{\circ}\) turn and the other with 15 bp per \(360^{\circ}\) turn.

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

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?

The genetic material found within some viruses is single-stranded DNA. Would this genetic material contain equal amounts of \(A\) and \(T\) and equal amounts of \(\mathrm{G}\) and \(\mathrm{C}\) ?
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