Upon the application of a botulinum toxin to a culture of freshly harvested neurons, a graduate student notices that activated neurons stopped releasing neurotransmitter upon activation. Performing a proteomic analysis she will not find which protein? a) synaptophysin b) synapsin

How are polyribosomes on theendoplasmic reticulum membranearranged so that the next initiatingribosome will find an unoccupiedtranslocator?

a variant of the SARS-CoV-2 virus has been found in brazil. this variant contains the mutation K417N, where the amino acid K has been mutated to the amino acid N. K and N refers to the one letter codes of the amino acids. a) state the names of the amino acids K and N. b) state one difference between the properties of these 2 aminoacids

A mutation takes place that switches a codon from ACG to ACA. What type of mutation is this? A) nonconservative missense B) silent C)nonsense D) Conservative missense

With protein kinase-mediated molecular switches, downstream target molecules are typically activated by ... a) being phosphorylated b) binding to ATP c) the action of a phosphataase d) hydrolysis of GTP e) binding to GTP

When  regulatory protein binds to a mature mRNA in the cytoplasm and prevents it from binding to a ribosome, this is an example of: A) transcriptional control B) post-transcriptional control C) post-translational control D) epigenetic control E) translational control

You are attempting to crystallize the head group of a myosin-like muscle protein from a newly discovered vertebrate organism. Assuming that the protein structure is similar to other vertebrate myosins, which enzymes should you use to remove the myosin-like head group from the rest of the myosin-like protein?       A)  both trypsin and myosinase   B)  both trypsin and papain   C)  papain   D)  trypsin   E)  myosinase

In a lysosomal storage disease, newly synthesized lysosome hydrolases are secreted from the cells rather than being delivered to the lysosomes. From the list below, what is the most likely reason? Please EXPLAIN. a) The cis-Golgi network lacks a proton gradient b) The ER is unable to produce lysosomal vesicles c) Lysosomal enzymes are not phosphorylated in the rER d) Mannose is not phosphorylated in the cis-Goligi network e) All the hydrolase genes are mutated, resulting in synthesis by ribosomes free in the cytoplasm rather than on the endoplasmic reticulum membrane Give typing answer with explanation and conclusion

Cytopathic effects (CPE) are visible changes in cells due to: A)viral infection B)mutations C)bacterial infections D)the cell's genes are being expressed

29 Which kind of macromolecule is regarded as a good candidate for the original self-replicator (or genetic molecule)  because it can both cause dehydration synthesis and encode information efficiently? a) Neurotransmitter                     b) DNA               c) Hormones                       d) Proteins             e) RNA