Most plastic is manufactured from petroleum products. Petrol is the end product of a few million years of natural decay of once-living organisms like plants and animals. Petroleum's main components come from lipids that were first assembled long ago in those organisms' cells. So the question is, if petroleum-derived plastic comes from biomaterial, why doesn't it biodegrade?
1.Decomposers don't have specific enzymes for plastic decomposition.
2.Because of high molecular weight of plastic, it will sediment too deep inside earth where bacteria is absent.
3.Because of colours in the polythene bags, decomposers are unable to decompose.
4. Bond energy in polymer is higher.
Most plastic is manufactured from petroleum products. Petrol is the end product of a few million years of natural decay of once-living organisms like plants and animals. Petroleum's main components come from lipids that were first assembled long ago in those organisms' cells. So the question is, if petroleum-derived plastic comes from biomaterial, why doesn't it biodegrade?
1.Decomposers don't have specific enzymes for plastic decomposition.
2.Because of high molecular weight of plastic, it will sediment too deep inside earth where bacteria is absent.
3.Because of colours in the polythene bags, decomposers are unable to decompose.
4. Bond energy in polymer is higher.
The correct option is D 4 and 1
The chemical bonds that hold the monomers of plastic together are stronger than power of nature to decompose them. The micro-organisms in soil can easily attack and decompose wood and other living materials with the existing biodegradable enzymes, but various other stronger chemical bonding materials such as plastics and interactions cannot be broken down because of lacking such high efficient enzymes to degrade.
4 and 1
The chemical bonds that hold the monomers of plastic together are stronger than power of nature to decompose them. The micro-organisms in soil can easily attack and decompose wood and other living materials with the existing biodegradable enzymes, but various other stronger chemical bonding materials such as plastics and interactions cannot be broken down because of lacking such high efficient enzymes to degrade.
