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BIOLOGY TOPIC 1 CELL BIOLOGY

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Question:

What are the features of a prokaryote (and function) (6)

Author: Sammy Universe



Answer:

Nucleoid: region in cytoplasm where DNA is located, (DNA strand is circular = genosphere) Plasmids: autonomous circular DNA molecules that can be transferred bw bacteria (horizontal gene transfre) 70S ribosomes: RNA + protein for translation Cell wall: outer covering made of peptidoglycan to maintain shape and prevent bursting Slime capsule: thick polysacch layer for protection against dessication (drying out) and phagocytosis Flagella: long progections w/ motor protein for movement (flagellum) Pili: hair like extensions to stick to surfaces / mediates bacterial conjugation


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