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“It says molecule, Not Macromolecule!”
All macromolecules are molecules (It is in the name macro is greek for large a macro molecule is a large molecule. RNA which is a string of smaller ribonucleotide bases (i.e. smaller molecules) is a macromolecule. IT is of course a molecule too)
Please let me know which point you disagree with:
(ive restated it since there is arguable in inaccuracy in my first iteration)
a) mRNA is string of nucleic acids.
b) a string of Nucleic acids is a macromolecules.
Therfore:
c) mRNA is a macromolecule.
(I changed this because A monomer for example Glucose is arguably not a macromolecule. However the polymer sucrose (Glucose+fructose) is without question a macromolecule, though of course it is a molecule as well.
Similarly an isolated nucleotide like Uracil might not be a Macromolecule. But a polymer like mRNA is without question a macromolecule (again, in addition to being a molecule).