Translation ends when a stop codon is at the ____ site, allowing a ____ to bind there
a. P; release factor
b. A; terminator tRNA
c. E; terminator tRNA
d. A; release factor
e. P; terminator tRNA
D
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Which of the following would be true if a toxin that blocks voltage-gated Ca2+ channels was applied to a neuron?
A. No resting membrane potential would be observed (i.e., measures at 0 mV). B. A rapid increase in membrane potential at threshold voltage would not occur. C. Membrane potential would increase rapidly to peak with an action potential, but would not decrease immediately afterwards. D. The neuron would become hyperpolarized. E. Neuron conducts action potentials normally, but would not transmit these potentials across chemical synapses.
A number of tumors and viruses (e.g., Epstein-Barr) are able to escape cytotoxic T cell degradation by inhibiting what?
A) helper T cell activation B) tumor antigen expression C) the production of the class I MHC molecule D) the production of the class II major histocompatibility (MHC) molecule E) the activation of the complement system
Why would a tall woman be at less risk of osteoporosis than a short woman, yet both would be at higher risk than a man?
What will be an ideal response?
Changing your view of reality involves a paradigm shift
__________________ Indicate whether the statement is true or false.