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Bio Chapter 5

Need to Know Pt.4

QuestionAnswer
Are lipids hydronic or hydrophobic? hydrophobic
Do lipids contain true polymers? No
Why do lipids mix poorly with water? Because they are composed of hydrocarbons
Give 3 forms of lipids fats, phospholipids, and steroids
What are the functions of lipids? Energy storage, membrane structure, insulation, and shock absorption
What molecules are fats constructed of? Glycerol and fatty acids
What is the composition of triglyceride? Glycerol and 3 fatty acids
What are the bonds in fats? Ester linkages
What is another name for triglyceride? Triacylglycerol
What do fatty acids vary in? Similarity, length(# of carbons), and # and locations of double bonds.
What can a diet with saturated fat contribute to? Why? Cardiovascular disease Plaque deposits
How do hydrogenous vegetable oils create unsaturated fats? With trans double bonds.
What can contribute more to cardiovascular disease than saturated fats? Trans fats.
Are all unsaturated fats synthesized by humans. No, some are not.
What is an essential fat? Why? Omega-3 Fatty Acid because it is required for normal growth and can provide cardiovascular protection.
Are the two fatty acids of a phospholipid hydrophobic or hydrophilic? hydrophobic
Do the phosphate group and attachments have a hydrophobic or hydrophilic head? Hydrophilic
When phospholipids are added to water... They self assemble into bilayers
When they are at a cell's surface, what direction do the tails point? The interior
Do the existence of cells depend on phospholipids? Yes
What does a high level of cholesterol contribute to? Cardiovascular disease
Created by: akierah.w
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