1, Define each physical requirements necessary for growth of bacteria. 2, Identi
ID: 132687 • Letter: 1
Question
1, Define each physical requirements necessary for growth of bacteria.
2, Identify and define 6 types of media that are used to culture bacteria based on ideal growth.
3, Define the physical requirements for the following organisms: Psychrophile, Mesophile, obligate anacrobe, the mobile, facultative anacrobe, extreme obligate halophile, acidophilus, facultative halophile.
4, What is osmotic pressure, how does it affect the cell, and how do food manufacturers exploit this physical characteristic in relation to microbial growth.
5, Explain how the following chemicals are important in microbial growth: Carbon, Phosphorus, Oxygen, Sulfur, and Nitrogen.
6, How is microbial growth measured directly.
7, Explain how microbial growth is measured indirectly.
8, Viruses lack metabolic enzymes needed to synthesize proteins or make ATP, so how do they produce protein that are responsible for the production of their capsids.
9, Identify the different morphologies found in viruses.
10, What is a prophage and which phage life cycle would I find in it.
11, Identity and elaborate on each stage in animal virus replication.
12, What is the difference between animal virus and bacteriophage replication
13, Calculate the number of bacteria cells that would be present in each of 8 generations if we started off with 10 cells? ( show calculation for n=2 through n=8)
14, Sketch a graph using the actual number of cells for the 8 generations in question 13.
15, Now sketch a graph using the log of those values for the 8 generations.
16. What are hyphae, which type of fungi has hyphae?
17, Describe the difference between septae and coencyntic hyphae. What is the difference between vegetative and aerial hyphae?
18, What are the four divisions of fungi and how are organisms classified into each division.
19, .the main form of asexual reproduction for fungi is through ............................. production?
20, What is the difference between conidiospores and sporangiospores?
21, List and describe each stage in fungal sexual spore production.
22, The phylum proteobacteria can be classified into what five classes, what type of bacteria make up this phylum?
23, List an example and characteristic or a disease caused from one member of each class that make up the phylum proteobacteria.
Explanation / Answer
1) the main requirements for growth are - the Food source, pH of the medium( Acidity/Alkalinity), Time of incubation, optimum Temperature for growth, Oxygen, and Moisture/humidity. the food industries use mnemonic- FAT TOM .
2) there are six basic type of media used in industries for bacteria- a) basal media like nutrient agar, b) enriched media like blood agar, c) selective media like Mac Conkey agar, d) differential media like Mac Conkey agar, e) transport media like Amies media and f) storage media like Egg saline media.
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