UDP-Glucose Pyrophosphorylase Works by This Mechanism

question 9

Multiple Choice

UDP-glucose pyrophosphorylase works by this mechanism:

• A) It adds a phosphate group to glucose from UTP, leaving behind UDP.
• B) It adds a UMP molecule to glucose-1-phosphate by splitting out pyrophosphate.
• C) It adds a pyrophosphate group to glucose, using UTP.
• D) It adds a UDP molecule to glucose by splitting out phosphate.

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Definitions:

Prokaryotic Cells

Cells without a nucleus or other membrane-bound organelles, including bacteria and archaea.

Eukaryotic Cells

Cells that contain a nucleus enclosed within membranes, distinguishing them from prokaryotic cells. They make up all complex organisms, including humans, plants, and fungi.

Nucleus

(1) The central region of an atom that contains the protons and neutrons. (2) A cell organelle in eukaryotes that contains the DNA and serves as the control center of the cell. (3) A mass of nerve cell bodies in the central nervous system. Compare with ganglion.

Membrane-Enclosed Organelles

Structures within eukaryotic cells that are surrounded by a lipid bilayer membrane, each performing distinct functions vital to the cell’s operation.