Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
1. You are given a milk sample that Mr. Milkman claims contains 4.5 x 108 CFU/ml. He claims this is within the limit of acceptable CFU/ml for Grade A milk. Diagram a procedure he could use to determine the CFU/ml and information pertinent to proving or disproving Mr. Milkman's claim. Is the milk within the acceptable limit?2. A plate of nutrient agar, labeled 10-4, has 255 colonies on it and another plate of media, labeled 10-5, has 27 colonies on it. What would be the number of CFU/ml in the original sample?3. I give you 6 mls of an overnight culture of Micrococcus luteus at a concentration of 4.5 x 106 CFU/ml. Diagram a dilution series to obtain countable plates by using tubes containing 9 ml nutrient broth (NB) and fixed-volume 1ml pipettes (won't measure any more or less than 1ml).4. I give you a very expensive strain of E. coli containing 106 CFU/ml and tell you that I need exactly 10ml of the same E. coli culture at a concentration of 103 CFU/ml (I don't want any excess culture). Using a dilution series, how would you get the correct concentration and volume of bacteria? Make this a realistic scenario.5. You are working at the local health department as a microbiologist. A number of people attest that chicken they bought at Mytummyhurts Grocery smells rotten. You take 50 gm (this is equal to ~ 55 ml) of the chicken, place it in a volume of 450 ml dH2O, and liquefy it. What is the dilution in simplest terms?6. If you had a liquid culture of Staphylococcus aureus and transferred 2 ml to test tube "R", which contains 6 ml of nutrient broth, what would be the final dilution (in simplest terms) of the culture in test tube "R"? From the culture in "R" make a 1:8 dilution in tube "S" (this is not the final or overall dilution). Now, determine what is the final or overall dilution of the culture in tube "S"?7. Perform a 2-fold serial dilution using 4 tubes containing 1 ml of NB each and a 12 ml broth culture of Bacillus subtilis; use the same B. subtilis culture and perform a 2-fold serial dilution using 4 tubes containing 2 ml of NB each; repeat in a similar fashion using 4 tubes containing 0.5 ml each.8. I have 400 mls of an antibiotic stock solution at a concentration of 16 mg/ml. I would like a final volume of 8 mls of the antibiotic at a concentration of 4.2 mg/ml. How much of the stock solution do I need to obtain this?9. How would you prepare 21 ml of a 1:7 dilution?10. How would you prepare 16 ml of a 1:
In kumquat trees, plant height is determined by 3 genes as in our simplified model of polygenic inheritance. Each locus has a contributing allele and non-contributing allele.
The client is 52years old and has a history of hypertension. His cholesterol level is 245. He states his job is very stressful. He admits he is overweight. His father died of stroke at age 60. The nurse encourages him to eat fish. Why is the nurse te..
The value of neutrons and protons a molecule have determine a molecules "Molecular Weight". An important part of working a laboratory involves making molar solutions.
What methods would be used to determine the arrangement of atoms within a protein? This method has also been used to detect and locate the spatial arrangement of the atoms of DNA.
If the ATP synthase molecules were randomly orientated so that about half faced the outside of the vesicle and half faced the inside, would you expect ATP to be synthesized.
Proteins discusses the different orders of protein structure. Explain why do you think it is that you can cook a pot roast where the meat proteins are altered by heating.
Which extinct species should be the best candidate to serve as the out-group for clade whose common ancestor occurs at position 2.
Does this indicate that our original estimate of 350 individuals was too low or too high? Explain your answer in terms of the principles that underlie mark recapture method.
There is 2-possible ways of inserting a gene into E.Coli that functions in converting a waste into an energy source.
Compare changes in carbon cycle to that of the nitrogen cycle on human health. Create a conceptual graphical model for how changing the carbon cycle is likely to impact human health.
Several of the cells hydrolytic enzymes are located in the lysozyme where the ph is five. What would you expect to be the optimum pH for these enzymes,
What is the significance of the chloroplasts structural feature that the thylakoid membrane is located between the stroma and the thyloakoid space.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd