A hydrophobic organic compound composed mainly of carbon and a high ratio of hydrogen to oxygen is a . Examples include fatty acids, fats, phospholipids, steroids, and prostaglandins.

Lipid

Explanation:

Lipid is known as a hydrophobic organic compound composed mainly of carbon and a high ratio of hydrogen to oxygen.

They usually form a large macromolecule and known to be insoluble in water and soluble in substances such as alcohol, ether which makes it non polar substances.

They are however very important and are major constituents of plants and animal cells

what school and grade?

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.