informalif you chew the cud, you spend a long time thinking or talking about something. Synonyms and related words. To think carefully or a lot about things.
Answer:
Carries copies of the instructions for assembling proteins: messenger RNA
Makes up the subunits of ribosomes: ribosomal RNA
Carries amino acids and matches them to the coded message for assembling proteins: transfer RNA
sections of an mRNA molecule that are removed: introns
Sections of an mRNA molecule that are not removed, and are joined together to form the completed molecule: exons
The same principle apply to stereo microscopes, a 10X eye piece combined with a 4X objective lens will produce 40X magnification.