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Definition
| A partition that grows between 2 daughter cells and they separate at this location |
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Term
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Definition
- Unequal cell division
- A new organism develops from an outgrowth or bud on another one
- Happens in yeast
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Term
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Definition
- Organisms don't increase much in number
- Metabolically active
- Produce large quantities of energy in the form of ATP
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Term
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Definition
- Growth occurs at an exponential (logarithmic) rate
- Organisms divide at their most rapid rate at a regular, genetically determined interval
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Term
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Definition
- New cells are produced at the same rate as old cells die
- # of live cells stays constant
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Term
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Definition
- Medium becomes less supportive of cell division
- Cells lose their ability to divide and thus die
- Number of living cells decreases at a logarithmic rate
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Term
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Definition
| Done to obtain bacterial culture at several different concentrations |
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Term
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Definition
- Acid-loving
- Grow best at pH 0.1-5.4
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Term
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Definition
- Grow best at pH 5.4 to 8.0
- Best for humans
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Term
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Definition
- Base-loving
- Grow best at pH 7.0-11.5
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Term
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Definition
| Organism must have a specified condition |
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Term
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Definition
| Organism is able to adjust to and tolerate environmental condition, but can also live in other condition |
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Term
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Definition
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Term
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Definition
- Optimum temp: 25-40o C
- Most human pathogens
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Definition
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Term
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Definition
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Term
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Definition
- Must have free oxygen for aerobic respiration
- Ex: pseudomonas
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Term
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Definition
| Do not require oxygen to grow |
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Term
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Definition
- Killed by free oxygen
- Ex: bacteroides
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Term
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Definition
| Grow best in presence of small amount of free oxygen |
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Term
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Definition
| Carbon-dioxide loving organisms that thrive under conditions of low oxygen |
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Term
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Definition
| Carry on aerobic metabolism when oxygen is present but shift to anaerobic metabolism when no oxygen |
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Term
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Definition
| Can survive in the presence of oxygen but do no tuse it in their metabolism |
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Term
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Definition
| Bacteria that need high pressures |
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Term
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Definition
- Salt-loving organisms which require moderate to large quatities of salt (sodium chloride)
- Need it to maintain high intracellular potassium concentration for enzymatic function
- Cells need sodium to maintain the integrity of their cell walls
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Term
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Definition
- Shrinking of cell
- Hypertonic
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Term
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Definition
- Cell gains water and bursts
- Hypotonic
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Term
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Definition
- Encourages growht of some but inhibits others
- Ex: antibiotics
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Term
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Definition
- Allows someone to distinguish between different microorganisms based on a difference in colony appearance
- Ex: MacConkey's agar
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Term
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Definition
| Contains special nutrients that allow growth of an organism that may not otherwise have been able to grow |
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Term
| Gram (-) is _______ on Differential Media |
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Definition
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Term
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Definition
- Formation of endospores
- Occurs in Bacillus, Clostridium, and a few other gram (+) bacteria
- Protective or survival mechanism, not for reproduction
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Term
| Gram (+) bacteria is _____ on Differential Media. |
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Definition
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