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Chapter 9: Q13P (page 290)

Why can鈥檛 triacylglycerols be significant components of lipid bilayers?

Short Answer

Expert verified

Phosphate is absent in triglycerides.

Step by step solution

01

Introduction

Many other organic compounds other than lipids are insoluble in water. such as alkanes that are insoluble in water are referred to as a lipid. They areenergy storage molecules and chemical messengers that include fats, waxes, oils, hormones, and some membrane components.

02

Lipid bilayer

Due to the existence of an aliphatic component in fatty acid chains,triacylglycerols are insoluble in water. Triacylglycerols are unable to form a bilayerdue to the absence of a polar head group. The non-polar acyl chain on the interior would have to be masked, and the glycerol molecule would have to be present on the surface in contact with water to create a lipid bilayer for the triacylglycerols.

03

Conclusion

Thus, triglyceride isunable to create a lipid bilayer because of the absence of a polar head group.

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Most popular questions from this chapter

Question: Lipids known as sulfatides occur in cells of the central nervous system. To which class of lipid does the sulfatide shown below belong? How does it differ from a typical member of that class?

Question: Most hormones, such as peptide hormones, exert their effects by binding to cell-surface receptors. However, steroid hormones do so by binding to cytosolic receptors. How is this possible?

Many bacterial fatty acids contain branches and even rings. What effect do these lipids have on membrane fluidity, compared to their straight-chain counterparts?

Summarize the structures and physical properties of fatty acids, triacylglycerols, glycerophospholipids, sphingolipids, and steroids.

Which lipids can be considered to be glycolipids? Phospholipids? Which are ionic?
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