L1 Is an IgSF Molecule That Has Been Shown to Be

question 19

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 connecting brain/spinal cord regions.
• 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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Definitions:

Bytes

A basic unit of digital information in computing and telecommunications, typically consisting of 8 bits.

Kilobyte

A unit of digital information that consists of 1,024 bytes, commonly used to measure storage capacity and data.

Bytes

A unit of digital information that typically consists of eight bits, commonly used to encode a single character of text in a computer.

Single Byte

The unit of digital information in computing and telecommunications that most often consists of eight bits.