Photosynthesis is the process by which light energy is converted to chemical-bond energy. Chemical-bond energy is found in food molecules. Ribosomes are non-membranous organelles on which proteins are manufactured. The Cytoskelleton of skeletal system of the cell consist of microtubules, microfilaments and intermediate filaments. The cytoskeleton gives the cells their shape, support and movement.
Microtubules are also essential in the separation of chromosomes during mitosis.
Microfilaments are associated with the plasma membrane. Intermediate filaments give strenght to the microtubules and to the microfilaments.