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Chapter 15: Q. 15.40 (page 529)

Describe the similarities and differences between lecithin and cephalins.

Short Answer

Expert verified
  • Choline is an amino alcohol that can be found in lecithin.
  • As an amino alcohol, cephalins contain serine or ethanolamine.

Step by step solution

01

Introduction.

Lecithin is a fat combination which is required by human cells. It can be found in a variety of foods, including soybeans and egg yolks.

Cephalins are phosphoglycerides that contain ethanolamine or the amino acid serine, both of which are linked to the phosphate group by phosphate ester bonds.

02

Given Information.

Explain the differences and similarities between lecithin and cephalins.

03

Explanation.

Choline is an amino alcohol that can be found in lecithin.

As an amino alcohol, cephalins contain serine or ethanolamine.

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Most popular questions from this chapter

One of the triacylglycerols in olive oil is glyceryl tripalmitoleate (tripalmitolein).

a. Draw the condensed structural formula for glyceryl tripalmitoleate (tripalmitolein).

b. How many liters of H2gas at STP are needed to completely saturate 100gof glyceryl tripalmitoleate (tripalmitolein)?

c. How many milliliters of a 0.250MNaOH solution are needed to completely react with 100g of glyceryl tripalmitoleate (tripalmitolein)?

Draw the line-angle formula for each of the following fatty acids:

a. palmitic acid

b. oleic acid

For each of the following fatty acids, give the shorthand notation for the number of carbon atoms and double bonds, and classify as saturated, monounsaturated, or polyunsaturated:

a. lauric acid

b. linolenic acid

c. palmitoleic acid

d. stearic acid

Identify each of the following processes as hydrogenation, hydrolysis, or saponification and give the products:

a. the reaction of corn oil and hydrogen H2with a nickel catalyst

b. the reaction of glyceryl tristearate with water in the presence of lipase enzyme

Describe some similarities and differences in the structures of a saturated fatty acid and an unsaturated fatty acid.
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