1. What makes one DNA molecule different from another?

Biology · Middle School · Thu Jan 21 2021

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The part of a nucleotide that can make it different from others is called the base . The four DNA bases are adenine, thymine, cytosine and guanine. These base names are abbreviated to A, T, C and G. Nucleotides are linked together to form strands. 

There are three different DNA types:

  • A-DNA: It is a right-handed double helix similar to the B-DNA form. 
  • B-DNA: This is the most common DNA conformation and is a right-handed helix. .
  • Z-DNA: Z-DNA is a left-handed DNA where the double helix winds to the left in a zig-zag pattern.

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