Animal Cell - Free printable to label + Color -kidCourses.com Can you label and color these important parts of the animal cell?. NUCLEUS control center for cell (cell growth, cell metabolism, cell reproduction). NUCLEOLUS synthesizes rRNA. RIBOSOMES the site of protein building, this is where translation takes place (mRNA in language of nucleic acids is translated into the language of amino acids). RER (Rough Endoplasmic Reticulum) synthesizes proteins ...