[-DNA & RNA Code of Life
The diagram at left illustrates a molecule of RNA. In particular,
it is a molecule of messenger RNA since it is long and straight. One can tell
the difference between RNA and DNA as RNA is a single-stranded nucleic acid
while DNA would have two sides to it as it's double-stranded. It is also an
RNA molecule as one of the colored nitrogen bases is labelled with a U for uracil.
Uracil is only found in RNA. If the molecule had a T (for thymine) in it, then
it would represent DNA.
Because it is a single strand, it is small enough to pass through
the holes in the nuclear membrane and move to the ribosomes in the rough ER
of the cytoplasm.
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Slichter