53. which process occurs during post-transcriptional modification of mRNA? a. ad

Question

53. which process occurs during post-transcriptional modification of mRNA?

a. addition of a GTP cap

b. introns are cut out and removed

c. addition of poly-A tail

d. all of the above occur during post-trancriptional modification of mRNA

e. none of the above are correct

80. which of the following statements concerning propagation of action potential is incorrect?

a. saltatory conduction occurs in myelinated nerve fibers

b. during conduction by local current flow, there is a flow of current between the active and adjacent inactive area of the cell membrane, thereby decreasing the potential in the inactive area

c.the action potential jumps from one schwann cell to adjacent schwann cell in a myelinated fiber

d. saltatory conduction is faster than conduction by local current flow

e. conduction by local current flow is the method of propagation in unmyelinated fibers

Explanation / Answer

Answer for 53 Q is (d). all of the above occur during post-trancriptional modification of mRNA.

Answer for 80 Q is .....(e). conduction by local current flow is the method of propagation in unmyelinated fibers

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