The Enzyme Poly-A Polymerase Is Responsible for Adding 3' Poly-A

question 10

Multiple Choice

The enzyme poly-A polymerase is responsible for adding 3' poly-A tails to eukaryotic mRNAs. This enzyme...

• A) cuts the mRNA after recognition of the cleavage/polyadenylation signal by CstF and CPSF proteins.
• B) polymerizes the tail using an RNA template that is part of the enzyme.
• C) is extremely processive.
• D) normally adds about 1000 A nucleotides to the mRNA.
• E) uses ATP as a substrate.

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Definitions:

Computing Mean

The process of calculating the average value of a set of numbers by adding them together and dividing by the quantity of numbers.

ΣX / N

The formula for calculating the mean of a set of data, where ΣX is the sum of all data points and N is the number of data points.

Arithmetic Average

Another term for the mean, calculated as the sum of all values divided by the number of values.

Frequency Value

The count of how many times a specific data point or value appears within a dataset.