If Adenine always pairs with Thymine and Guanine always pairs with Cytosine, what % of DNA would be made up of Cytosine if 20% was made up of Adenine?
A. 20 B.30 C.40 D.60

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass

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