The Specificity of Signaling Pathways Does NOT Include

question 3

Multiple Choice

The specificity of signaling pathways does NOT include:

• A) flippase-catalyzed movement of phospholipids from the inner to the outer leaflet.
• B) migration of signal proteins into membrane rafts.
• C) phosphorylation of target proteins at Ser, Thr, or Tyr residues.
• D) the ability to be switched off instantly by hydrolysis of a single phosphate-ester bond.
• E) the assembly of large multiprotein complexes.

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Definitions:

Psoas Major

A deep-seated muscle of the back that helps in flexing the hip and the lumbar spine.

Medial Rotation

A rotational movement towards the midline of the body.

Biceps Femoris

A muscle of the thigh that is part of the hamstring group, involved in knee flexion and thigh extension.

Popliteus

A small muscle located at the back of the knee joint, critical for unlocking the knee from a fully extended position.