The enzyme tryptophan synthase is composed of two polypeptide subunits each encoded by one gene in neurospora crassa. a mutant produces no tryptophan synthase due to a single point mutation in each of the genes (a and b) encoding the two protein subunits. a researcher is interested in identifying a revertant which produces fully functional tryptophan synthase. if the reversion rate for point mutations in n. crassa is 1 x 10-6 per haploid gamete, how many spores, on average, would the researcher need to screen to identify one revertant with the genotype a+ and b+ (functional alleles) which therefore can synthesize tryptophan synthase? a. 106 b. 2x106 c. 1012 d. 10-6 e.

How is the motion of the particles of water at 80 ⁰c different from the motion of the particles of water when it is 30 ⁰c?

The dna in a cell’s nucleus encodes proteins that are eventually targeted to every membrane and compartment in the cell, as well as proteins that are targeted for secretion from the cell. for example, consider these two proteins: phosphofructokinase (pfk) is an enzyme that functions in the cytoplasm during glycolysis. insulin, a protein that regulates blood sugar levels, is secreted from specialized pancreatic cells. assume that you can track the cellular locations of these two proteins from the time that translation is complete until the proteins reach their final destinations.for each protein, identify its targeting pathway: the sequence of cellular locations in which the protein is found from when translation is complete until it reaches its final (functional) destination. (note that if an organelle is listed in a pathway, the location implied is inside the organelle, not in the membrane that surrounds the organelle.)

Arepair man charged $93.06 the price included 2 hours of labor and 40 service charge how much does the repairmen charge per hour for labor?