Minerals and Nutrients

Formaldehyde ferredoxin oxidoreductase is a tungsten containing metalloenzyme.

Carboxypeptidase, Collagenase, Carbonic anhydrase and Alcohol dehydrogenase: all are Zn(II) containing enzymes.

Iron (Fe) is a micronutrient and is required in small quantity by plants.

Metalloprotein is a protein that contains a metal ion cofactor. Molybdenum containing metalloproteins are Xanthine oxidase, Nitrate reductase, Sulfite oxidase, etc. Hydrogenase contains Nickel-Iron as cofactor. 

Meat supply many nutrients like iron, protein, magnesium, zinc and fat etc. But calcium is present in only negligible quantity. 

Plasma constitutes them.

Bone cells are embedded in a hard matrix that is composed of calcium and phosphorus compounds

Talc is a hydrated magnesium silicate mineral with the chemical formula Mg3Si4O10(OH)2, composed of magnesium, silicon, and oxygen. It is used in talcum powder and cosmetics due to its softness and ability to absorb moisture. Options A, B, and D incorrectly list elements like zinc, calcium, and tin which are not found in talc.

Pearl is formed during protection against foreign invaders.

Active mineral absorption requires energy (ATP) because minerals are moved against their concentration gradient from soil to root cells. This is an active transport process facilitated by carrier proteins in the cell membrane. Active water absorption is passive (osmosis), photophosphorylation produces ATP but doesn't directly drive mineral uptake, and vascular bundle cells facilitate transport but don't power it.

Nitrogen deficient plants will also exhibit a purple appearance on the stems, petioles and underside of leaves from an accumulation of anthocyanin pigments.

 It is a primary macronutrient of the plants.

Potassium regulates the opening and closing of the stomata by a potassium ion pump. Since stomata are important in water regulation, potassium reduces water loss from the leaves and increases drought tolerance.

Vitamin B12, also known as cobalamin, is the only vitamin that contains cobalt as an essential component of its molecular structure. The cobalt atom sits at the center of the corrin ring and is crucial for B12's biological activity. Iron is important for hemoglobin, magnesium is a cofactor for many enzymes, and zinc is involved in immune function, but only cobalt is integral to vitamin B12.