Lipids

What are the atoms involved in lipids?

• Carbon, hydrogen, and oxygen

• Nitrogen, phosphorus, and sulfur

• Calcium, potassium, and sodium

• Iron, magnesium, and zinc

What type of bond is found between glycerol and fatty acids in lipids?

• Ester bond

• Peptide bond

• Covalent bond

• Ionic bond

What is the main difference in terms of atoms between lipids and carbohydrates?

• Lipids have a smaller proportion of oxygen to carbon and hydrogen

• Lipids have a larger proportion of oxygen to carbon and hydrogen

• Lipids have the same proportion of oxygen to carbon and hydrogen as carbohydrates

• Lipids do not contain oxygen

What is the function of lipids when oxidized?

• Provide energy

• Store water

• Act as electrical insulators

• Protect organs

What is the structure of triglycerides?

• Three fatty acids combined with glycerol

• Two fatty acids combined with glycerol and phosphate

• One fatty acid combined with glycerol and phosphate

• Three fatty acids combined with glycerol and phosphate

What is the main difference between saturated and unsaturated fatty acids?

• Saturated fatty acids have no double bonds between carbon atoms

• Unsaturated fatty acids have no double bonds between carbon atoms

• Saturated fatty acids have more double bonds between carbon atoms

• Unsaturated fatty acids have more double bonds between carbon atoms

What is the main difference in structure between triglycerides and phospholipids?

• Phospholipids have a phosphate group instead of one fatty acid

• Phospholipids have three fatty acids instead of one phosphate group

• Triglycerides have a phosphate group instead of one fatty acid

• Triglycerides have three fatty acids instead of one phosphate group

What is the function of phospholipids in the cell surface membrane?

• Form a bilayer and provide cell recognition

• Store energy and provide insulation

• Act as electrical insulators and protect organs

• Release water and provide an important source of water

What is the purpose of the emulsion test for lipids?

• To detect the presence of lipids

• To determine the structure of lipids

• To measure the energy content of lipids

• To identify the type of lipids

What is the main difference in structure between triglycerides and phospholipids?

• Phospholipids have a phosphate group instead of one fatty acid

• Phospholipids have three fatty acids instead of one phosphate group

• Triglycerides have a phosphate group instead of one fatty acid

• Triglycerides have three fatty acids instead of one phosphate group