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Questions and Answers
Which of the following is a role of lipids in living organisms?
Which of the following is a role of lipids in living organisms?
- Cell structure and boundary (correct)
- Nervous system regulation
- Protein synthesis
- Carbohydrate storage
What elements make up lipids?
What elements make up lipids?
- Nitrogen, hydrogen, and oxygen
- Carbon, hydrogen, and oxygen (correct)
- Carbon, oxygen, and sulfur
- Carbon, nitrogen, and oxygen
What type of fatty acids have double bonds between carbon atoms?
What type of fatty acids have double bonds between carbon atoms?
- Trans fatty acids
- Saturated fatty acids
- Unsaturated fatty acids (correct)
- Monounsaturated fatty acids
What is the function of cholesterol in the body?
What is the function of cholesterol in the body?
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What happens when three fatty acids bond to a glycerol molecule?
What happens when three fatty acids bond to a glycerol molecule?
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What type of triglycerides contain only saturated fatty acids?
What type of triglycerides contain only saturated fatty acids?
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Study Notes
- Lipids are essential components of every cell membrane in living organisms.
- They are part of the phospholipid membrane that acts as a boundary for cells.
- Lipids include not only fats but also oils, waxes, and steroids.
- Steroids such as cholesterol and hormones like testosterone and estrogen are lipids.
- Lipids are large organic macromolecules made up of carbon, hydrogen, and oxygen.
- Monomers called fatty acids form lipids through chemical bonds.
- Saturated fatty acids have single bonds between carbon atoms, making them solid at room temperature.
- Unsaturated fatty acids have double bonds between carbon atoms, making them liquid at room temperature.
- A lipid polymer called a triglyceride forms when three fatty acids bond to a glycerol molecule.
- Saturated triglycerides contain only saturated fatty acids, while unsaturated triglycerides have unsaturated fatty acids.
- Lipids play various roles in living organisms, including cell membranes, long-term energy storage, insulation, and hormone formation.
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