Why is DNA a good molecule for information storage?
DNA can be wound up to be very, very, VERY, compact. As a result, it can hold an enormous amount of information. Through the use of nitrogenous bases [see ‘Nitrogen’s Purpose’ under 2.A.3], the code written in DNA can be detailed and precise; one DNA molecule includes many genes. DNA also provides instruction for its own replication, so this allows for information to be duplicated as well as stored.
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