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Q1. The concentration of LIN-14 protein, high during the L1 larval stages and decreasing in later stages, regulates the timing of cell divisions in the T-cell lineage in C. elegans. According to the hypothesis presented, lin-4 RNA regulates the level of LIN-14 protein by binding to the lin-14 mRNA and preventing translation. If you could introduce extra copies of lin-4 into the cells and more lin-4 RNA was produced, what effect do you think the extra copies of lin-4 would have on translation of LIN- 14? What effect might this have on cell lineages during development?"
Q2. Describe the physical changes that would occur in SIM medium if you inoculated an organism that was negative for hydrogen sulfide but positive for indole production and motility.
Why could prokaryotes quickly reinfect a patient if they are not wiped out? How may this result in the evolution of drug-resistant pathogens.
plating .1ml of a sample diluted by a factor of 10^-3 produced 43 colonies. what was the original concentration in the sample?
Compare and contrast the mechanisms of transcription initiation in prokaryotes and eukaryotes. Suppose you were to count one coliform colony produced from a 10 ml water sample.
The purpose of this exercise is to demonstrate the comparative effect of UV on three bacterial populations. This could have been accomplished without a cardboard or plastic cover. Why was the cover used?
The following amino acid sequence was derived from the DNA sequence of a gene encoding a hypothetical type I integral plasma membrane protein. (The • merely indicate every 10 amino acids beginning with M1 & ending with V140). Use this informat..
How will chronic Hepatitis C impact a female's reproductive system? Discuss sex hormone levels, hypothalamic-pituitary axis changes, fertility and menstruation changes.
Which of the following is true about DNA?
What is herd immunity? How does it work? What evidence do we have for it? What measures are currently taken in the U.S. to maintain it for certain diseases? What is a vaccine? How are vaccines made?
Carbon fixation requires the expenditure of ATP molecules which is generated by A. formation of glucose during the Calvin cycle B. replenishment of chlorophyll C. ETS.
The ______ avoids backflow of blood from right ventricle into right atrium. The ______ valve avoids the backflow of blood from aorta into left ventricle. The ______ valve avoids the backflow of blood from the pulmonary artery into the ______.
What diseases are lethal if the individual inherited homozygous alleles but are evolutionary advantageous when the individual inherit heterozygous allele.
q. your friend has now joined a lab that studies vesicle budding from the golgi and has been given a cell line that
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