Question
Asked Mar 10, 2020
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The underlying structure of DNA is very simple, consisting of only four possible building blocks.
a. How is it possible for DNA to carry complex
genetic information if its structure is so simple?
b. What are these building blocks? Can each block be
subdivided into smaller units, and if so, what are
they? What kinds of chemical bonds link the building blocks?
c. How does the underlying structure of RNA differ
from that of DNA?

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Expert Answer

Step 1

DNA (deoxyribonucleic acid) is an information storage molecule and its primary function is to carry the instructions for the synthesis of proteins that are vital for the cellular function. James Watson and English physicist Francis Crick are two biochemists who structurally defined DNA.

Step 2

a. Nucleotides form building blocks of DNA, and these blocks are arranged in a definite order in the DNA. The amount of DNA in any cell is immense. In humans, for example, each nucleus contains 6.4 billion nucleotides and they are arranged in a wide variety of combinations. This amount of nucleotide combinations is responsible for storing a large amount of genetic information.

Step 3

b. Nucleotides are the building blocks of DNA. They can be subdivided into smaller units. A nucleotide consists of a pentose sugar, phosphate group, and nitrogenous base. The types of nitrogenous bases found in DNA are adenine, guan...

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