Name the shape of each bacterium: (a) Streptococcus pneumoniae, round cells in pairs and chains…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Name the shape of each bacterium:
- (a) Streptococcus pneumoniae, round cells in pairs and chains
- (b) Clostridium botulinum, a straight rod
- (c) Vibrio parahaemolyticus, a curved rod
- (d) Spirillum minus, a rigid spiral
Need a reminder? The key ideaShow
Bacteria are the sole members of kingdom Monera. A bacterial cell has no nuclear membrane and no membrane-bound organelles, and its wall is not of cellulose. By shape bacteria are coccus (round), bacillus (rod), vibrio (comma) or spirillum (spiral). They divide mostly by binary fission, so after divisions one cell becomes . Archaebacteria (halophiles, thermoacidophiles, methanogens) live in extreme places because of a different cell wall.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
(a) Round: coccus.
(b) Rod: bacillus.
(c) Curved rod, like a comma: vibrio.
(d) Spiral: spirillum.
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