Botulinus toxin causes paralysis. It binds to presynaptic sites at the motor end plate (neuromuscular junction) and prevents the exocytotic release of transmitter from vesicles. Predict the consequences (increase, decrease, no change & explain why) of blocking the release of acetylcholine at the neuromuscular junction on the following: 1. Presynaptic […]

RNAse is an enzyme that cleaves the P–O^5′ bond in RNA. it has two His residues in the active site. Suggest a plausible explanation why the enzyme activity changes when pH is increased or decreased from ~pH 6.0, Choose all the true statements a.) the RNAse reaction is an example […]

1) Determine where are the hydrophobic or hydrophilic residues concentrated? Where does your mutation fall relative to these clusters and to the inside/outside of the protein? 2)What (if any) are the primary partner(s) or binding site component(s) [such as a heme, DNA, GSH (Glutathione)? It should be obvious to you […]

1) What is a bioindicator? What ecological and biological aspects make lichens good indicators of poor air quality? In the study by Cameron et al. (2007) what were the pros and cons of using lichens to access air quality? How might these issues be addressed in future research projects? 2) […]