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Chapter 9: Problem 33

Could single-stranded DNA form a stem-loop structure? Why or why not?

Short Answer

Expert verified
Yes, single-stranded DNA can form a stem-loop structure. The reason for this is that sections of the single-stranded DNA are complimentary and can therefore pair when the strand folds back on itself.

Step by step solution

01

Understanding Structure of DNA

Begin by understanding the fundamentals of the DNA structure. DNA molecule is made up of two strands, wound around each other to form a double helix. Each strand is made up of a sequence of nucleotides; adenine (A), cytosine (C), guanine (G), and thymine (T). These pairs are held together via hydrogen bonds, making them compatible pairs.
02

Comprehending single-stranded DNA and Stem-loop

Then, realize that although DNA is usually double-stranded, it can exist in a single-stranded form. A stem-loop structure in DNA occurs when the strand loops back on itself, allowing the complementary bases to pair and form a double-helix structure.
03

Drawing conclusion

In conclusion, based on the information given, single-stranded DNA can form a stem-loop structure. This is because there are sections in the strand where bases are complimentary, and when it loops back on itself, those sections can pair similarly to pairs in a double helix. These paired sections form the 'stem', and the unpaired section forms the 'loop'.

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Most popular questions from this chapter

Discuss the structural significance of complementarity in DNA and in RNA.

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

What is meant by the term DNA sequence?

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

List the structural differences between DNA and RNA.
See all solutions

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