2. Folic acid is normally given to pregnant women, at the same time antagonists to folic acid are used for the treatment of some types of cancer. Explain why?

 3. There is an increase in clothes made of wool when ironed while ironing has no effects on silky clothes, why? 

4. Classify the following as either releasing or demanding energy: 

a. Oxidation of palmitic acid to CO2 and H2O 

b. Synthesis of glycogen from glucose 

c. Triglyceride synthesis from fatty acids and glycerol

 d. Conversion of glucose to two molecules of pyruvate 

5. Explain 3 interactions among vitamins and minerals in body tissues.