Minerals and Nutrients

 K, P & N are the three main macronutrients present in the soil

Carbon is the common compound in petroleum, coal, fabrics and proteins. Coal and hydrocarbons are widely used as fuels. Carbon compounds are also used in formation of fabric. The essential ingredients of foods like proteins are composed of carbon.

Among the elements listed, only carbon has a significant atmospheric phase in its biogeochemical cycle - as CO2 in the atmosphere. Sodium, phosphorus, and magnesium cycle primarily through rocks, water, and organisms without a major atmospheric reservoir. Carbon cycles through atmosphere (CO2), oceans (dissolved CO2, carbonates), biosphere, and lithosphere.

Iron is the main source of hemoglobin in our body.

We get iodine from fish.

Approximate elementary composition of human body (dry weight basis) is as follows: a. Calcium - 4%b. Phosphorus -2.5%c. Sodium - 0.4%d. Iron - 0.01%e. Iodine - 0.0000.5%f. Chlorine - 0.4%

This is the correct option. Chlorine is a micronutrient. They are present in plants in small quantities, less than 1 ppm of dry matter.

Iron is involved with the enzyme aconitase, which is used in the krebs cycle in the conversion of citrate into isocitrate.

Molybdenum is required as a cofactor with the enzyme nitrate reductase involved in the nitrogen fixation process.

Enolase catalyses the conversion of 2-phosphoglycerate (2-PG) to phosphoenolpyruvate. Magnesium is required as a cofactor with this enzyme.

Catechol dioxygenase is an iron-containing enzyme.

Neutral protease and α-Amylase contain zinc (Zn²⁺) and calcium (Ca²⁺) ions.

Alkaline phosphatase contains both zinc (Zn²⁺) and magnesium (Mg²⁺) ions.

The majority of phosphorus found in the body is bound up with calcium in the bones as calcium phosphate, accounting for around 80% of the bodily total. The main component of bones and teeth is Calcium phosphate.

Iodine is present in thyroxine hormone.