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Suppose you innoculate a PR broth with a slow-growing fermenter. After 48 hours, you see slight turbidity but score it as (-/-). Is this result a false positive or a false negative? Is this a result of roor specificity or poor sensitivity of the test system?
Early formulations of this medium used a smaller amount of carbohydrate and occasionally prodused false alkaline (pink) result after 48 hours. Why do you think this happened? List at least two steps, as a microbiologist, that you could take to prevent the problem.
Determine which of the following methods can be used to identify the mesodermal cells that give rise to the vertebrate limb?
Why is proline frequently encountered at the places in the myoglobin and hemoglobin molecules where the polypeptide chain turns a corner?
Suppose that the 3-loci , each with two alleles determine the difference in height between two homozygous strains of a plant.
Complete a chart by identifying six actions that reduce the risk of infection and strengthen the body's immune system. In the second column, explain how the action reduces risk of infection and strengthens the body's immune system.
define What enzymes would be released to digest.
Identify a mutant whose chromosomes shorten after each round of replication. A mutation in which gene would explain this observation?
Colonies were then transferred to plates containing a minimum media. To grow on minimum medium, yeast cells must be wild type and able to produced their own amino acids, and nucleotides.
which changes made the most severe effect on the protein
What defence was successful in preventing you from grab the snake. While travelling in Texas, you stumble across a snake with red, yellow, and black bands.
Diversity in tropical regions is generally greater than at high latitudes. Explain two different hypotheses that propose the mechanism for this pattern that remains a biological mystery
A genomic library is made for a haploid organis with a genome of 3 X 10^9 bp. If you want to clone five genome equivalent into a vector library.
In humans, a dimple in the chin is a single gene, autosomal dominant characteristic. A man with the dimpled chin, whose mother lacked dimpled chin.
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