Gewi education and welfare institute

1) Regular intake of fresh fruits and vegetables is recommended in the diet since they are a good source of antioxidants. How do antioxidants help a person maintain health and promote longevity? (a)  They activate the enzymes necessary for vitamin synthesis in the body and help prevent vitamin deficiency (b)  They prevent excessive oxidation of carbohydrates, fats and proteins in the body and help avoid unnecessary wastage of energy (c)  They neutralize the free radicals produced in the body during metabolism (d)  They activate certain genes in the cells of the body and help delay the ageing process     Click Here for Answer    Answer - (c)     2) The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation? 1.   There are no clouds or water vapour in the lower stratosphere. 2.   There are no vertical winds in the lower stratosphere. Which of...