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A water sample was analyzed to determine the concentration of bacteria in it. It was diluted as follows: 1ml of sample placed in 9ml of sterile water (tube A) from this solution, from that another 1ml was placed in 9ml of sterile water (tube B) and from that 1ml was placed in another 9ml of sterile water (tube C). Spread plates were then made by taking 1.0ml and 0.1ml from the last two tubes. The places were incubated and the results are tube C having 260 CFU from the 0.1 ml volume transfered. Determine the concentration of bacteria.
Assume you are given a primer with a concentration of 1.4 mg/ml, RNA concentration of 0.8 mg/ml, 1M MgCl2, 10mM dNTP mix, 10x buffer, 10 units/ul of reverse transcriptase.
Occasionally, subjecting a plant to photoflood and a fan will produce a lower rate of transpiration than exposing it solely to a photoflood. Why is alcohol effective against some viruses and not others?
Which region of the brain has changed the most during the course of vertebrate evolution? Why do you think this is so?
Red flowers are dominant over white flowers. The flower color gene is represented with R/r. Large leafs are dominant over small leaves. The leaf size gene is represented L/l.
Assume many of the atoms of nitrogen in a double-stranded molecule of DNA, of isotope N-14, were replaced with the isotope N-15
Show your work. State the phenotypes of the two parents of the original wild-type fly.
More than a dozen recessive illnesses that are very rare in most of world are fairly common among the Bedouin people who live in the Negev Desert area of Israel.
What is the function of the retina? What is the function of the choroid layer?
Circulatory system. Describe how chemistry, tissues, and cells act as building blocks of that organ and system. You will require including information on anatomy and physiology as well as interesting facts you found while doing your research.
The molecules of all matter, particularly gases and liquids, are in constant vibration motion. As a result of this motion, molecules are continually colliding with one another, much like balls scattering over a pool table.how to Add a coverslip ov..
The forces governing the diffusion of a gas through a biological membrane include the pressure difference across the membrane (change in P), the cross sectional area of the membrane.
There is a stable pH and electrical potential difference across the mitochondrial membrane in actively respiring cells. The pH of the cytoplasm is 6.8, the pH of the mitochondrial matrix.
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