L1 Is an IgSF Molecule That Has Been Shown to Be

question 17

Multiple Choice

L1 is an IgSF molecule that has been shown to be important in neural development; it is thought that it may be involved in axon growth within the embryonic nervous system.What evidence supports this statement?

• A)L1 mutants always die.
• B)L1 mutants show deficits in their vision.
• C)People who die of L1-deficiency are often missing two large nerve tracts.
• D)People who die of L1-deficiency are often missing a significant portion of their brain.
• E)People who die of L1-deficiency are often missing a significant portion of their spinal cord.

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