Nutrition in Plants and Animals Test - 2

Plants require expenditure of energy for the active uptake of minerals.It is in the form of ATP.

Boron is useful in seed germination. It is also essential for seed and cell wall formation.

Microelements in plants act as cofactors of enzymes.they are boron (B), chlorine (Cl), manganese (Mn), iron (Fe), zinc (Zn), copper (Cu), molybdenum (Mo), nickel (Ni).

The mineral element calcium is essential for root growth. It is one of the macronutrient.

Deficiency of phosphorus causes premature leaf fall in plants.

The enzyme nitrogenase is required for nitrogen fixation.All nitrogenases have an iron- and sulfur-containing cofactor that includes a heterometal complex in the active site (e.g., FeMoCo).

Minerals are absorbed by the process of active transport. Active transport is the movement of molecules across a cell membrane in the direction against their concentration gradient, i.e. moving from an area of lower concentration to an area of higher concentration.

Rhizobium is a nitrogen fixing bacterium.they are Gram-negative, motile, non-sporulating rods.

The process of conversion of ammonia to nitrite by microbes is called nitrification.The transformation of ammonia to nitrite is usually the rate limiting step of nitrification. Nitrification is an important step in the nitrogen cycle in soil.

K+ ions controls the stomatal movement in plants. Basically Opening and closure of the stomatal pore is mediated by changes in the turgor pressure of the two guard cells.