The most likely reason a metastatic tumor cell might lose its connection to the basal lamina would be:
A. a change in the composition of the basal
lamina.
B. the loss of integrin proteins from the cell's
surface.
C. a change in the type of integrin proteins
present on the cell's surface.
D. Answers b and c are both correct.
D
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Explain the process of site-directed mutagenesis, and discuss some applications of this technique
What will be an ideal response?
Of the following steps associated with translation, which does not involve hydrolysis of GTP?
A) aminoacylation of tRNA B) formation of the initiation complex C) binding of the aminoacyl tRNA to the codon at the A site D) translocation of the ribosome E) release of polypeptide
The process whereby repeated, short stimuli provided to a hippocampal neuron have the effect of strengthening the synapse it makes with other neurons is specifically referred to as
A. long-term potentiation. B. short-term potentiation. C. neurotransmission. D. synaptic reuptake. E. None of these choices are correct.
What is the main determinant of biome distribution?
a. vegetation type b. climate c. ocean currents d. elevation e. weather