lysosomes and vacuoles both are cell organelles that are membrane bound, and used for storage.
lysosomes contain/ store digestive enzymes and also known as suicidal bags.
vacuoles contain/ store undigested/ waste materials
RNA molecules are produced during transcription, the molecules being the ribonucleotides of mRNA
They are composed of long chains of amino acids.
The building blocks of protein are amino acids. Amino acids are organic molecules made up an alpha (center) carbon atom which is linked to an amino group, a carboxyl group, a hydrogen atom and a variable component known as a side chain.
Amino acids are joined to each other by peptide bonds to form either a short chain called an oligopeptide or a long chain called a polypeptide. These chains are what forms the protein.
The word sponge is more appropriate to use than Underground river since an underground river can loose water while an aquifer cannot loose water, unless it is open-air and above ground. then the aquifer would slowly loose water due to evaporation from the sun.
