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Exam 29: Lipids

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Question 21

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From the statements below,pick out the one that is not correct for fat-soluble vitamins.

A) Fat-soluble vitamins are classified as lipids.
B) Fat-soluble vitamins are a group of biologically active compounds containing 20 carbon atoms.
C) Fat-soluble vitamins are required in small quantities for normal metabolism.
D) Fat-soluble vitamins are stored in fat cells for use when they are needed.

E) All of the above
F) B) and D)

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Question 22

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What is the structure of a cortisone derivative that has a C=C between C6 and C7,methyl group at C8 and chlorine at C12? The configuration of C8 is S and the configuration at C12 is R.

A) I
B) II
C) III
D) IV

E) B) and D)
F) A) and B)

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Question 23

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Solid fats are generally from what source?

How many isoprene units can be found in the following compound?

Patchouli alcohol is an example of a terpene.How is this molecule classified?

Which of the following compounds is not a lipid?

Sphingomyelins are a major component of the myelin sheath.Damage to the myelin sheath results in such diseases as multiple sclerosis.Which compound below corresponds to a sphingomyelin?

What chemical process causes an oil (such as soybean oil) to become rancid?

Eicosanoids are derived from what compound?

Which structure represents the lowest energy conformation of a trans-decalin?

Triacylglycerol A yields compound B when treated with excess H₂,Pd-C.Ozonolysis of A affords three molecules of compound C and one molecule of compound D.What is the structure of A? Choices for Triglycerol A:

How can an unsaturated fatty acid be converted into a saturated fatty acid?

Which of the following fatty acids has the lowest melting point?

The stereoselective introduction of the C15 OH group on the w side chain of prostaglandins has presented a challenge for synthetic chemists.Recently,Mulzer and co-workers demonstrated a new route in which the w side chain is synthesized independently and then attached to the bicyclic counterpart.What is the appropriate sequence of reagents for the following synthesis?

Liquid oils usually have a higher percentage of what component compared to solid fats?

Provide a definition of the term lipid.

What is the purpose of vitamin K?

Which of the following fatty acids has the highest melting point?

Which of the following is not one of the three main categories of hydrolyzable lipids?

Which of the following compounds is a steroid?