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Prions are the causative agents of progressive neurodegenerative disorders that affect both humans and animals. Like viruses, prions are acellular, however unlike viruses, bacteria, or other parasites, they contain no nucleic acid genome, and so individual prions are not capable of replication. Yet, they are able to transmit from one person or species to another via a mechanism that results in prion amplification (infectious). What are prions made of? Described the mechanism used by prions that results in amplification of prion molecules.
Explain how this could be considered a negative feedback mechanism. The amino acid residues at the active site are highly hydrophobic. In designing a drug that would bind to the active site and jam it, researchers must use which type of molecule.
How is sex determined in grasshoppers? Can you find out other examples of organisms with a similar system of sex determination.What syndrome is defined by an XXX genotype.
Determine the genotype and phenotype on the F1 and F2 generations when you cross a wildtype female with a double mutant male.
Discuss how the unique physical and chemical properties of water contribute to the importance of water for life on Earth to survive.
in Kansas, a farmer is growing a variety of wheat called TK138. He calculates the narrow sense heritability for yiels (the amount of wheat produced per acre).
Create an action potential and on the same graph inclde the changes in only the sodium conductance (gNa+). You can indicate the shape with solid line.
Suppose that a light-sensitive cell in the eye of a particular invertebrate. The cell membrane contains cGMP-gated K+ channels.
Suppose that the incomplete dominance for each unlinked locus, how many different phenotypes will be seen in a progeny of individuals with the following genotypes: AA Bb CC Dd ee Ff Gg x Aa Bb CC Dd EE Ff Gg?
Compare DNA and RNA with regard to their structure, function, location, and activity. Ho do these molecules differ with regard to the polymerases used to synthesize them?
In the common mouse species, Mus musculus, the mutant yellow fur gene is dominant to the allele for normal fur color. When homozygous.
Three Hfr strains of E. coli are known to transfer their genetic material during conjugation in different sequences. Given the time of entry of the markers into the F- recipient,
What fraction of offspring of the cross AabbDd x AaBbdd are expected to have the same phenotype as either one of their parents assume that all three genes are on different chromosomes.
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