Manganese is an activator of enzymes. Copper is essential for photosynthesis. Molybdenum is a cofactor of enzymes. Boron assists in sugar transport.

Correct Option: A

Manganese is an activator of enzymes. Copper is essential for photosynthesis. Molybdenum is a cofactor of enzymes. Boron assists in sugar transport.

Phosphorus and nitrogen are essential elements normally required in large quantities by plants.

Correct Option: D

Phosphorus and nitrogen are essential elements normally required in large quantities by plants.

The parts of the plants that show the deficiency symptoms also depend on the mobility of the element in the plant. For element that are actively mobilised within the plants and exported to young developing tissues, the deficiency symptoms tend to appear first in the older tissues. For example, nitrogen, potassium and magnesium are visible first in the senescent leaves.

Correct Option: A

The parts of the plants that show the deficiency symptoms also depend on the mobility of the element in the plant. For element that are actively mobilised within the plants and exported to young developing tissues, the deficiency symptoms tend to appear first in the older tissues. For example, nitrogen, potassium and magnesium are visible first in the senescent leaves.

Potassium is not a constituent of any enzyme but is an activator of enzymes. Potassium is an essential mineral and is found in more amounts in actively dividing cells such as buds, young leaves, root tips, etc. It has some other roles like regulating stomatal movement and protein synthesis.

Correct Option: C

Potassium is not a constituent of any enzyme but is an activator of enzymes. Potassium is an essential mineral and is found in more amounts in actively dividing cells such as buds, young leaves, root tips, etc. It has some other roles like regulating stomatal movement and protein synthesis.

A plant requires magnesium for chlorophyll synthesis. All four rings bind with metal atom magnesium (Mg⁺⁺), which remain present at the center of chlorophyll molecule.

Correct Option: B

A plant requires magnesium for chlorophyll synthesis. All four rings bind with metal atom magnesium (Mg⁺⁺), which remain present at the center of chlorophyll molecule.