When an L/S Ratio by Thin-Layer Chromatography Is Performed,a Mature

question 28

Multiple Choice

When an L/S ratio by thin-layer chromatography is performed,a mature fetal lung will show:

• A) Sphingomyelin twice as concentrated as lecithin
• B) No sphingomyelin
• C) Lecithin twice as concentrated as sphingomyelin
• D) Equal concentrations of lecithin and sphingomyelin

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Definitions:

Differentiate

To recognize or ascertain what makes something or someone different, or in biology, the process by which cells or tissues change from relatively generalized to specialized kinds, during development.

Derived

Obtained from a specific source or originating from something; made by altering or modifying something else.

Ectoderm

is the outermost layer of cells or tissue of an embryo in early development, giving rise to the epidermis and nervous system.

Notochord

A pliable stick-like structure composed of a substance akin to cartilage, offering support within all embryonic and certain adult members of the chordate group.