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A series of enzymes catalyze the reactions in the metabolic pathway X → Y → Z → A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme. What is substance X?
Teres Minor
A small muscle of the rotator cuff that assists in rotating the arm laterally and stabilizes the shoulder joint.
Biceps Brachii
A muscle of the upper arm that flexes the forearm and is involved in moving the shoulder and elbow.
Ventral Root
The part of a spinal nerve that emerges from the anterior portion of the spinal cord, containing motor fibers that transmit neural signals from the spinal cord to the body muscles.
Dorsal Root Ganglion
A cluster of nerve cell bodies (neurons) located in the dorsal root of spinal nerves, containing sensory neurons that transmit signals from the periphery to the spinal cord.
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