Term
| Describe what happens in the Lag phase. |
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Definition
Cells are growing and dying at the same time.
No change in number of cells. |
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Term
| Describe what happens in the Log or exponential growth phase. |
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Definition
| Growing, although some cells are still dying. |
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Term
| Describe what happens in the stationary phase. |
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Definition
| Growth slows as cells are competing for fuel. |
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Term
| Describe what happens in the death or logarithmic decline phase. |
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Definition
| Cells are dying and even minimal reproduction. |
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Term
| Why doesn't growth begin immediately upon inoculation? |
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Definition
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Term
| Mesophiles temperature growth range? |
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Definition
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Term
| Thermophiles temperature growth range? |
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Definition
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Term
| Psychrophiles temperature growth range? |
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Definition
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Term
| Psychrotrophs temperature growth range? |
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Definition
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Term
| Where are Psychrotrophs and Psychrophiles found? |
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Definition
| In pockets of water within ice. |
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Term
| Acidophiles use buffers to manage internal _____? |
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Definition
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Term
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Definition
| Water loss causing the shrinkage of the cell's cytoplasm. |
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Term
| Why is carbon about 1/2 the weight of a typical cell? |
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Definition
| It is the backbone of all organic molecules. |
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Term
| What part of the cell needs nitrogen to grow? |
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Definition
| proteins and nucleic acids |
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Term
| Phosphorus and sulfur make up about 4% of these cell components. |
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Definition
| nucleic acids, phospholipids ; amino acids |
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Term
| K, Ca, Mg, Fe Cu, Mb, & Zn are trace elements found in cells, what is there importance? |
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Definition
| They are cofactors for enzymes |
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Term
| Obligate aerobes use what type of respiration? |
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Definition
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Term
| Facultative anaerobes use what type of respiration? |
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Definition
| both aerobic and anaerobic |
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Term
| Obligate anaerobes use what type of respiration? |
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Definition
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Term
| Aerotolerant anaerobes use what type of respiration? |
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Definition
| Anaerobic but will still grow in the presence of oxygen. |
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Term
| Micro-aerophiles use what type of respiration? |
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Definition
| Only aerobic growth but oxygen is required in low concentrations. |
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Term
| What came first, photosynthesis or respiration? |
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Definition
| Photosynthesis, aerobic respiration can't happen without oxygen. |
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Term
| Why is it good that there was no oxygen in early earth atmosphere? |
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Definition
| It is extremely reactive. |
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Term
| Why are biofilms so important to many bacteria? |
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Definition
| They can gather nutrients, attachment, protection, and cooperativity. They can exchange genetic information |
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Term
| Why do we want to grow bacteria cultures in the lab? |
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Definition
| To prevent cross contamination and so we know the medium. |
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Term
| What are a couple of culture medium requirements? |
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Definition
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Term
| How do we grow anaerobic microbes in the lab? |
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Definition
| By removing all of the oxygen from the growth environment. |
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