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Suppose the two tryptophan codons within the leader peptide of the trp operon were changed from tryptophan to asparagine. Predict if attenuation (premature termination of transcription) of the trp operon will occur if bacteria are grown on media containing:
a. high tryptophan, high asparagineb. high tryptophan, low asparaginec. low tryptophan, high asparagined. low tryptophan, low asparagine
A colloidal system is stable in the absence of polymer. A small amount of polymer is added and the colloidal particles coagulate but if a large amount of polymer is added they redisperse.
A pregnant woman is worried about the chances of her child having hemophilia as both she and her husband have paternal grandfathers with hemophilia.What are the likely genotypes of the couple
In a small population of snapdragons experiencing incomplete dominance, 30 percent express the homozygous dominant phenotype of red flowers, 50 percent have the heterozygous phenotype
Discuss and explain why do you think that molecular evidence often yields an earlier date for a speciation event than fossil evidence?
How does real time PCR work to quantify the initial amount of the DNA template? How should the method be modified to quantify the initial amount of RNA template extracted from tissue or cells?
Which wavelengths of visible light carry the most energy? How does this relate to strategies for plant photosynthesis? Why was it important to mark the TLC plate with pencil?
If Penicillium typically secretes penicillin without disturbing the lichen relationship in which it is engaged, then what should have been true about its partner.
Think about a cross between a male who has vitamin D resistant rickets and a female who has fully functional PHEX protein and does not express vitamin D resistant rickets.
Discuss similarities and differences of homeostatic mechanisms for thermoregulation in ectothermic and endothermic animals.
Determine which of the following groups can be involved in hydrophobic interactions?
Which of the following is the best experimental protocol by which to test the preference of an herbivore for one of two plants.
suggest an experiment to test. give the relationship between mtDNA and human ageing.
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