Practise IB Biology SL B1.1.8 by linking lipid hydrophobicity with water and non-polar solvent solubility, and classifying common lipids as non-polymers.
Fats are used by mammals and oils are used by plants for energy storage. Both of these types of lipid are triglycerides.
Explain the reasons for oils being insoluble and sugars such as glucose being soluble in water.
a. sugar/glucose is hydrophilic;
b. oils are hydrophobic;
c. sugar molecules are polar whereas oil molecules/hydrocarbon chains are non- polar;
d. oil does not form hydrogen bonds with water whereas sugar/glucose does;
e. oil molecules are more attracted to each other than to water / vice versa;
f. water is polar and polar substances are attracted to each other;
Both parts of mpc and mpd are required for the mark