Which Enzyme Is Responsible for Adding the Poly(A)tail to MRNA

question 14

Multiple Choice

Which enzyme is responsible for adding the poly(A) tail to mRNA?

• A) cleavage stimulatory factor (CStF)
• B) poly(A) polymerase
• C) cleavage and polyadenylation specificity factor (CPSF)
• D) poly(A) binding protein

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Definitions:

Structural Components

The physical parts or elements that make up an object, system, or organism, providing it with stability and form.

Microfilaments

Small, rod-like structures present in the cytoplasm of all eukaryotic cells, composed mainly of the protein actin, and involved in various forms of cell movement and in the maintenance of the cell's shape.

Rodlike Structures

Any elongated, cylindrical shapes or components found in biological organisms or cells, often referring to the physical structure of certain proteins or cellular organelles.

Actin

The protein of which microfilaments consist. Actin, together with the protein myosin, is responsible for muscle contraction.