Question

QUESTION 19 Why is it very difficult to fight viral infections? O A virus is not alive and therefore impossible to kill. It is hard to destroy a virus without damaging the host. The cell wall of a virus is too thick to penetrate. The RNA and DNA of a virus is too different. O A and B QUESTION 20 Which is better for you: a drug that is a natural product or one that is synthetic? Whether a drug is good for you does not depend upon whether the drug occurs naturally or was synt Synthetic products are generally better for you because they lack impurities that could bring on side- Drugs extracted from natural products are invariably better for you. Drugs extracted from natural products are better except in the case where the synthetic drug is a repli QUESTION 21 What is the cause of physical pain? nerve impulses rapid damage response synthesis of chemicals in the body inflammation a sensation only perceived in the brain all of the above

Answer 1

DATE: 120 PAGE No 1 (DNA OY RNA) 19. virus is a tiny infection agent that reproduces inside the cell of the living hest. virus particle - are smaller than bacteria. It cannot be seen with light microscope. Virus are made from three main component 1. nucleic acid 2. protein Coating that protect the nucleic acid. 3 lipid coat that surround the protein coat. virus depend on host cell for viral loroduction In the body, virus follow a pauiticulau cycle for the Meproduction of new virus first virus- particle attach itself to the host cell then particle release its DNA ON RNA into the hest - cell. There are two way by which vieus break- out of the hest cell fest ý simply kill the hast cell by breaking open the host cell and is by pinching out from cell membrane and break away (budding with a plece of the cell memembran sworrounding them. Virus leave the cell. In this way hest cell is not destroy a od There ý no evidence that natural chung are super than synthetic cug. since herbal medicine- come from nature does not mean they are always «ау bеса е һечhkava and Com да hаvе I been linked to liver damage. But in case 7 Synthetic dreng, quality control is before it Ý sold to the public synon have gone through scientific test. ensured hetic drug

DATE: 20 PAGE No 9 енуоuѕ ДАҒer Ethyl alcohol ť a central nervous sy depressant. Low doses of ethye alcohol as a stimulantı heducing inbibitio. Ethanol may modify some opiate recepte It may also modify the effect of opiode in the animals. 27. Metabolism refers to all the chemical reaction in the body, including these that use onygen and create coulbon dioxide og and con are involved in both Mespiration and metabolism. Metabolism sometime te referred to as cellular respiration and Metabolism is the sum of all the chemical reacto involved in catabolising and anabolisman Anabelic reaction use the energy produced by catabolic reaction 5 Disacchaudes form when two mono saccharides undergoa denyration leaction. Two mene bacche may be or may not be same For en two glucese condense to forma molecule of maltese disaccharide Glucose and fructose condense to form surdo disaccharide substance Organic Carbohydrates are most abundant organic in nature. It ý formed by green po from Cog and water during the photosy process er blant