threadlike structures that assist in movement cylindrical tubular organelles that are involved in cell division tube-like structures that are the site of protein and lipid synthesis contain chlorophyll and are the site of photosynthesis the sites of cellular respiration and energy production digestion organelles that break down biomolecules into smaller molecules chloroplasts arrowBoth centrioles arrowBoth endoplasmic reticuli arrowBoth mitochondria arrowBoth cilia and flagella arrowBoth lysosomes