Question

Ethylene is a metabolic product of
a. Valine
b. Serine
c. Methionine
d. Glutamic acid

Answer 1

Hint: Ethylene is a simple organic compound, which has carbon double bonds, and it is inflammable gas which has a sweet odor, and taste, natural sources of ethylene is natural gas and petroleum, while it is also naturally produced in plants.

Complete answer:
- Ethylene is also produced as a product of many industrial organic chemicals.
- It is produced by heating either natural gas, ethane, and propane to the temperature of 800 to 900degree temperature, where it produces a mixture of gases.
- Among all gases, ethylene is separated and used for many purposes.
- Ethylene produced as an industrial byproduct is mainly used in two things, It is used as the monomer, while this monomer is further used by polymerization, and produces the polyethylene, and also used for the production of packing films and wire coatings, and it is starting material for other industrial products.
- At the same time, ethylene is an important metabolic product of methionine.
- Methionine is one of the essential amino acids, in the methionine cycle or yang cycle, ethylene is produced as the byproduct.
- In the yang cycle or methionine cycle, S adenosyl methionine is produced by the action of enzymes.
- Where this S adenosyl methionine is converted to aminocyclopropane. It is the rating limiting step in the ethylene biosynthesis pathway.
- The next step is the production of ethylene from the aminocyclopropane.

Hence, the correct answer is option (C).

Note: Ethylene is produced in the combustion of organic substances, because of this, in case of forest fires and volcanoes eruption, ethylene concentration is usually observed in the atmosphere, because of little higher concentrations in those conditions, it has harmful effects on surrounding vegetation.