WorksheetsLipids Multiple Choice Quiz
Total questions: 10
Worksheet time: 5mins
What are the constituent molecules in a lipid/triglyceride?
Glycerol and amino acids
Glycerol and fatty acids
Fatty acids and glucose
Glycerol and phosphate
What are the differences between a triglyceride and a phospholipid?
Phospholipids have more fatty acids
Phospholipids have a phosphate group instead of one fatty acid
Triglycerides are found in membranes
Triglycerides contain phosphate groups
Distinguish between a saturated and unsaturated fatty acid:
Saturated fatty acids have carbon-carbon double bonds
Unsaturated fatty acids have one or more carbon-carbon double bonds; saturated have none
Saturated fatty acids have fewer hydrogens
Unsaturated fatty acids are solid at room temperature
Which of the following is NOT a function of lipids?
Energy storage
Insulation
Catalysis
Protection
Why are lipids a good energy store?
They have many C-H bonds and are energy-dense
They dissolve in water
They contain iron
They are compact and insoluble
What is the general formula for a saturated fatty acid?
CnH2n+2COOH
CnH(2n)O2
CnH2nO2
CnH2n-2COOH
Why is consumption of too many saturated fats considered unhealthy?
They are insoluble in water
They can increase LDL cholesterol and risk of heart disease
They are used in respiration
They cause dehydration
Which part of a phospholipid is hydrophilic and which is hydrophobic?
Fatty acid tails are hydrophilic, head is hydrophobic
Both are hydrophilic
Phosphate head is hydrophilic, fatty acid tails are hydrophobic
Both are hydrophobic
What is the bond called between a fatty acid and glycerol?
Hydrogen bond
Ester bond
Glycosidic bond
Peptide bond
How would you test for the presence of a lipid?
Add iodine
Heat with Benedict’s
Add ethanol and water – look for a milky-white emulsion
Add biuret reagent
