Cell Structures & Their Functions

1. A hollow cylinder formed from a ring of short microtubules (9 triplets of microtubules); Act as MTOCs if found at the bases of cilia where they are known as basal bodies (10)
7. The largest cell organelle; Controls all the activities of the cell (7)
8. The membrane around a vacuole; Controls the exchange between the vacuole and cytoplasm (9)

1. Contains fibres of cellulose; Gives the cell a definite shape, Prevents the cell from bursting when water enters by osmosis, Freely permeable to allow free movement of ions and molecules (4, 4)
3. Long, rigid, hollow tubes found in the cytoplasm; Together with actin filaments & intermediate filaments, they make up the cytoskeleton, Allow movement of secretory vesicles & organelles & cell components along its outside surfaces (12)
4. Has small pores called nuclear pores; Allows and controls exchange between the nucleus and the cytoplasm (7, 8)
5. Just visible as black dots (80S in cytoplasm but 70S in mitochondria and chloroplasts); The site for protein synthesis (9)
6. Spherical sacs, surrounded by a single membrane; Contain hydrolytic enzymes and are responsible for the breakdown of unwanted structures (9)
9. Fine strands of cytoplasm which pass through pore-like structures in the cell wall; Link neighboring plant cells (13)
10. Sausage-like shape and surrounded by two membranes and the inner of these is folded to form finger-like cristae which projects into the interior solution or matrix; Carries out aerobic respiration and the synthesis of lipids (12)

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