The genome of a newly-isolated member of the Proteobacteria has been completely sequenced and its genome size determined to be 5.5 Megabase pairs. A broth culture of this Proteobacteria has been grown to a density of 2 x 108 cells per mL in a 5-mL volume. Estimate the total amount of DNA in the culture, express your answer in kilometers, then describe this total DNA length in terms of a symbol on the log scale below (yellow star, black heart, green square, etc.) You may assume that there is exactly one copy of the genome per cell and that each base pair contributes 0.34 nm to the genome length.

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).