MICRB 201H-Quiz 1 (Fall 2022) Name: 1. (2 pt) Briefly describe surface to volume ratio and growth rate of the bacterial cell change as it gets smaller Smaller cells grow faster since small cells have a higher surface-to-volume ratio, which allows them to take in nutrients and discard waste more efficient than larger cells (lower surface-tovolume ratio). 2. (2 pt) List two functions of bacterial cell envelope Select two from the following: Permeability barrier Protein anchor Transport Energy conservation and consumption 3. (1 pt) Briefly describe what energy is used for rotating bacterial flagella motor Proton flow through rotation ring 4. (2 pt) What is the key difference between autotrophs and organotrophs? Autotrophs: Synthesize their own organic (carbon-containing) compounds from CO2 Organotrophs: Obtain their carbon from pre-synthesized organic compounds 5. (3 pt) Sketch a bacterial growth curve and indicate growth phases

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