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Male cockroaches with mutations that strongly decrease the function of an RTK (receptor tyrosine kinase) called RTKX are oblivious to the charms of their female comrades. This particular RTK binds to a small molecule secreted by sexually mature females. Most males carrying loss-of-function mutations in the gene for Ras protein are unable to respond to females. You have just read a paper in which the authors describe how they have screened cockroaches that are mutant in RTKX for additional mutations that partly restore the ability of males to respond to females. Propose two possible additional mutations in two separate genes from the receptor that could allow cockroaches with a mutant RTKX to now respond to females. You may consider mutations that could either increase or decrease the activity of the protein. Explain your answer.
Palmitate uniformly labeled with the radioisotope 3H to a specific activity of 2.5 x 108 cpm per micromole of palmitate is added to mitochondria, which oxidize it to acetyl-CoA.
Explain why proteins are superior to both RNA and DNA for structural and enzymatic function?
Consider the following reaction sequence S + E (ES)1 (ES)2 --> P + E The first reversible reaction has forward and reverse rate constants of k1 and k2; the second reversible reaction has forward and reverse rate constants of k3 and k4; the thi..
What type of cells emphasizes mainly glycolysis for ATP production. What is the biochemistry of acidic and alcoholic fermentation?
A circular coil enclosing an area of 160 cm2 is made of 210 turns of copper wire. The wire making up the coil has resistance of 7.0 ?, and the ends of the wire are connected to form a closed circuit.
Pyrolase, is a cellulase isolated from a hyperthermophilic archeon that grows in a hydrothermal vent and is used in which industry?
In the wild, male house finches (Carpodus mexicanus) vary considerably in the amount of red pigmentation in their head and throat feathers, with colors ranging from pale yellow to bright red.
In maize, a dominant allele (A) is essential for seed color as opposed to colorless (a). Another gene has a recessive allele (w) which results in waxy starch, as opposed to normal starch (W).
The wider orrcurence of glycolysis in nearly all organisms, both aerboic and anaerobic, indicates that it is one of the most ancient metabolic pathways.
State how the amonio acids sequence you obtained from the gene fragment for botana curus compares with the sequence for other three species.
A and B are linked. Analysis of a linked RFLP in two purebreeding lines, AABB and aabb, demonstrate that the first was also homozygous for a long RFLP allele.
Determine which biological macromolecule is not really a polymer and Which statement about biological polymers and their precursors below is TRUE?
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