Jonas Salk developed a(n) (attenuated/inactivated/subunit) polio vaccine in 1955.
Fill in the blank(s) with the appropriate word(s).
inactivated
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Action potentials are propagated in a one-way direction down a neuron plasma membrane because
a. the action potential is of insufficient intensity to stimulate the voltage-gated ion channels behind it. b. the adjacent channels upstream from the action potential are ligand-gated. c. the adjacent channels upstream from the action potential are in their refractory period. d. voltage-gated ion channels are suppressed. e. the adjacent channels upstream from the action potential are at their threshold potential.
Which of the following statements is NOT
true?
a. All isotopes of an element have the same number of electrons. b. All isotopes of an element have the same number of protons. c. All isotopes of an element have the same number of neutrons. d. All radioisotopes are unstable. e. All isotopes of an element have the same atomic number.
The alkylating agent nitrosoguanidine adds methyl groups to nucleotide bases and is repaired by which enzyme that removes the added methyl group and restores nucleotides to their normal form?
What will be an ideal response?
Although autoantibodies to nucleic acids are characteristics of (HIV/RA/SLE), many other autoantibodies are produced
What will be an ideal response?