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Chapter 9: Problem 18

What structural feature allows DNA to store information?

Short Answer

Expert verified
The structural feature of DNA that allows it to store information is its sequence of nucleotides, particularly the order of bases (adenine, thymine, guanine, cytosine)

Step by step solution

01

Understanding the structure of DNA

DNA, or deoxyribonucleic acid, is composed of two strands that are twisted together to form a double helix structure. Each of these strands is made up of nucleotides, which are the basic building blocks of DNA.
02

Examining the Nucleotides

Each nucleotide has three parts: a sugar molecule, a phosphate group, and a nitrogenous base. The order of these bases within the strand is what allows DNA to store information.
03

Understanding the Principle of Base Pairing

DNA bases pair up with each other with adenine (A) always pairing with thymine (T), and cytosine (C) always pairing with guanine (G). The precise way these bases pair up allows the DNA to replicate itself accurately.
04

The Information Storage Capability

The sequences of the bases encode the genetic information. Just in the same way as letters in a sentence, the order of these bases tells cells which proteins to make, determining how the cells function and ultimately influencing the whole organism.

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Most popular questions from this chapter

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

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?

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.

A DNA-binding protein recognizes the following double-stranded sequence: $$ \begin{aligned} &5^{\prime}-\mathrm{GCCCGGGC}-3^{\prime} \\ &3^{\prime}-\mathrm{CGGGCCCG}-5^{\prime} \end{aligned} $$ This type of double-stranded structure could also occur within the stem region of an RNA stem-loop. Discuss the structural differences between RNA and DNA that might prevent the DNAbinding protein from recognizing a double-stranded RNA molecule.

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