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You received a probiotic sample supposed to contain 20 billion CFU of probiotics per serving. You make four (4) serial dilutions (dilution 1, dilution 2, dilution 3 and dilution 4) of the sample by pipetting 0.5 ml into 19.5 ml of medium during each dilution step. Then you pipette a 0.2 ml sample from dilution 3 and 4 onto the surface of a MRS agar plate. After 48 hours incubation time, you count 89 bacterial colonies on the plate with the dilution 4 sample. What was the "CFU" of the probiotics sample you received? Is the number in agreement with the stated CFU number?
Which transport mechanism can be visualized as a relay race? What is being transported like a baton in a relay race? What is being transported into cell by this process? Explain the steps of this transport process from start to finish nothing what..
q. you find out a mutant yeast strain that cannot grow while provided with pyruvate as its sole carbohydrate though it
1 the chief disadvantage to a firm that decides to follow a product specialization strategy in selecting target markets
The secretory coil fills the lumen with a NaCl solution that is isotonic with the blood plasma. As this solution moves upward through the reabsorptive duct,
The presence of blood and protein in the urine can indicate the inflammation of the glomerulus. Why would glomerular inflammation result in these substances passing into filtrate and the urine?
What characteristics are shared by these toxins, and what characteristics of these toxins make these toxins vulnerable to toxicity of these specific systems?
The structure of a phospholipid molecules admirably suits it to the function of
Depicts samples from four cylindrical tendons and all are composed primarily of collagen. Each has been clamped at both ends and a machine is used to gradually pull the ends in opposite directions (arrows) until the material yields
Write Journal Article on The Biology of HIV, the Path from HIV to AIDS
Cells are composed of compartments called organelles. Discuss why this kind of organization helps the cell carry out its diverse functions.
How do human activities increase the occurrence of species extinction? one-two paragraph
Many infectious diseases are becoming difficult to treat because of bacterial resistance to antibiotics. Populations of bacteria can become resistant when they are exposed to an antibiotic. What is the best general explanation for how this occurs?
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