organelle functions, types of mRNA

cytosol

contains many metabolic pathways; protein synthesis

nucleus

contains main genome; dna & rna synthesis

ER

synthesis of most lipids; synthesis of proteins & lipids for either secretion or delivery to another organelle

lysosomes

intracellular degradation

endosomes

sorting of endocytosed material

mitochondria

ATP synthesis by oxidative phosphorylation

chloroplasts

ATP synthesis & carbon fixation by photosynthesis

peroxisomes 

oxidation of toxic molecules 

mRNA

messenger RNAs, code for proteins

rRNA

ribosomal RNAs, form the basic structure of the ribosome and catalyze protein synthesis

tRNA

transfer RNAs, central to protein synthesis as adaptors between mRNA and amino acids