1)Which of the following is not a molecule that would form part of the head grou

Question

1)Which of the following is not a molecule that would form part of the head group for a glycerophospholipid?

Choline

Ethanolamine

Sphingosine

Inositol

2)Imagine that you have vesicles containing pure stearic acid, for which you measure the melting temperature, Tm. If you add arachidonic acid to the vesicles, how would you expect the Tm of the vesicle to be affected?

Tm would increase as you add more arachidonic acid

Tm would decrease as you add more arachidonic acid

Tm would remain the same regardless of added arachidonic acid

Tm would oscillate as you add arachidonic acid, first increasing and then decreasing as more is added

Choline

Ethanolamine

Sphingosine

Inositol

Explanation / Answer

1) Of the following the one that is not a molecule that would form part of the head group for a glycerophospholipid is,

C. Sphingosine

2) If we add arachidonic acid to vesicles containing pure stearic acid, the Tm expected of the vesicle would be,

B. Tm would decrease as you add more arachidonic acid.

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