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1. Could an organism be both MR and VP negative? Explain please
2. Any organism that uses the Krebs cycle can use citrate and most organisms have the enzymes for the Krebs cycle. Why then do so many organisms test Citrate negative with the citrate test?
Develop hypotheses predicting the effect of pyrite and coal on the acidity of water? Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1?
Calculate the size of the smallest resolvable object if 600-nm lightis used to observe a specimen with a 100oil-immersion lens having a numerical aperture of 1.32. How could resolution be improved using this same lens?
How might you find out whether the turbidity in your nutrient broth tube was from a mixture of different microbes or from the growth of only one kind of microbe.
Assume your supervisor has found a new test kit that she wants to start using. She has asked you to validate the kit. Please explain some tests that might be needed?
For each of amino acids, is the side chain hydrophobic, polar but uncharged, positively charged, or negatively charged at physiological pH?
A swarm of insects blows out to sea in a storm. They arrive at a tiny island and form a new population. After many generations, they have diverged from the source population on the mainland.
The genome of a particular bacterium is approximately 4 million base pairs. If this bacterium can complete a round of DNA replication in 40 minutes, how fast must its replisome travel?
Consider that, in the hypothetical study given in the table below, cases underestimated their exposure and, as a result, 20% of exposed cases were falsely classified as unexposed.
What appendages of the skin play a role in thermoregulation?
What are two cancers that occur predominantly in children(less than 13 years of age), and why is it thought that these cancers occur early in life?
What molecular evidence do scientists have that all life is at least distantly related and has a common ancestor? What six elements are most prevalent in living organisms?
Two protein kinases, PK1 and PK2, work sequentially in intracellular signaling pathway. You construct cells that contain inactivating mutations in the genes that encode either PK1 or PK2
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