The amino acids in the original partial sequence (N-term-...V-G-E-N-E-S...-C-term) have little to no impact on protein structure and function, with the exception of serine. Phosphorylation of the serine residue is required for normal function of the protein. Given this information, which reversion mutation(s) in the gene would restore the normal function of the entire protein? Select the four correct answers. Deletion of 5 base-pairs in the region of the valine codon
Insertion of 4 base-pairs in the region of the valine codon
Deletion of 1 base-pair in the region of the valine codon
Deletion of 2 base-pairs in the region of the valine codon
Insertion of 2 base-pairs in the region of the valine codon
Insertion of 1 base-pair in the region of the valine codon

Which term best describes a community in which people work mostly in factories? a.agricultural. b.hunting and gathering. c.domesticated. industrial.

Phosgene is a chemical agent that is formed by decomposition of chlorinated hydrocarbon solvents by ultraviolet radiation. a. false b. true

Choose the incorrect statement (a) the motor end plate membrane is only capable of generating graded potentials, but it is contiguous with the skeletal muscle sarcolemma, which can generate action potentials. (b) propagation of an action potential through the t-tubules into the sarcoplasmic reticulum triggers the release of ca++ into the cytoplasm of a skeletal muscle fiber. (c) the generation of suprathreshold endplate potentials in multiple muscle fibers could be due to the increased frequency of action potential generation at the axon hillock of a single motor neuron. (d) a greater amount of ach would be found in the presynaptic vesicles of a motor unit that fired several action potentials after exposure to botulinum toxin, than in a motor unit that fired several action potentials after exposure to the venom of the krait snake (which contains α-bungarotoxin).