Which of the Following Is a Function of a Poly-A

question 19

Multiple Choice

Which of the following is a function of a poly-A signal sequence?

• A) It adds the poly-A tail to the 3' end of the mRNA.
• B) It codes for a sequence in eukaryotic transcripts that signals enzymatic cleavage ~10-35 nucleotides away.
• C) It allows the 3' end of the mRNA to attach to the ribosome.
• D) It is a sequence that codes for the hydrolysis of the RNA polymerase.
• E) It adds a 7-methylguanosine cap to the 3' end of the mRNA.

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Definitions:

Muscle Hypertrophy

The increase in muscle size and mass due to exercise, particularly strength training.

Fibrosis

A pathological process characterized by the accumulation of excess fibrous connective tissue in an organ or tissue.

Refractory Period

The period immediately following the transmission of an impulse in nerve or muscle cells during which a second impulse cannot be generated.

Tetanus

A serious bacterial infection characterized by muscle stiffness and spasms, caused by the toxin produced by Clostridium tetani.