Minerals and Nutrients

Manganese is a naturally occurring element and an essential nutrient. ECF contains large amounts of sodium, chloride ions and moderate amounts of bicarbonate ions. Potassium, calcium, magnesium and phosphate ions are present in very minute quantities. But manganese is not present in ECF.

Hemocyanins are respiratory proteins in the form of metalloproteins containing two copper atoms that reversibly bind a single oxygen molecule (O₂). Oxygenation causes a colour change between the colourless Cu(I) deoxygenated form and the blue Cu(II) oxygenated form. Unlike the hemoglobin in red blood cells found in vertebrates, hemocyanins are not bound to blood cells but are instead suspended directly in the haemolymph.

Brown algae called Kelp are the nautical multicellular algae rich in Iodine and  Potash. It plays major role in aquatic ecosystem both as food  and  the habitat they create.

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

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.