entrosomes move to opposite ends of the cell. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 15) The DNA-containing control center for cellular operations is the A) endoplasmic reticulum C) Golgi apparatus B) nucleus D) ribosomes 16) Several antibiotics work by blocking the function of ribosomes. Therefore, these antibiotics will A) block DNA synthesis B) block RNA synthesis C) block protein synthesis D) prevent the movement of proteins through nuclear pores 15 16) A) storage of biomolecules 17) Which does NOT accurately complete the sentence? One of the major functions of BOTH TYPES of endoplasmic reticulum (ER) is the 17) B) transport of biomolecules D) storage of genetic material for the cell 18) C) synthesis of biomolecules 18) The functions of centrioles include A) producing ATP B) serving as the site for RNA synthesis C) organizing the mitotic spindle in cell division D) serving as the site for protein synthesis 19) The cytoskeleton is composed of. A) microfilaments, cilia, intermediate filaments B) microvilli, cilia, microfilaments C) microfilaments, microtubules, lysosomes D) microfilaments, intermediate filaments, microtubules. 19)