Nutrition in Plants and Animals Test - 1

Pea plant can fix nitrogen from air.Nitrogen fixation is a process in which nitrogen (N2) in the atmosphere is converted into ammonium (NH4+) or nitrogen dioxide (NO2).

Bilirubin and biliverdin are found in bile. Bilirubin is created by the activity of biliverdin reductase on biliverdin, a green tetrapyrrolic bile pigment that is also a product of heme catabolism. Bilirubin, when oxidized, reverts to become biliverdin once again.

Carbon is the most abundant element found in plants.Plants acquire carbon from the atmosphere through photosynthesis.

Among the following plant nutrients, calcium is a macronutrient. Rest other options are micronutrients.

C, H, O and N are the most abundant elements in the living cells.

Ca is a macronutrient. Rest other options are micronutrients.

Nickel is a non essential micronutrient. Rest options are elements essential for plant growth which are needed in only very small (micro) quantities.

Mg and Fe helps in the synthesis of chlorophyll in plants.Chlorophyll is the molecule that absorbs sunlight and uses its energy to synthesise carbohydrates from CO2 and water. This process is known as photosynthesis and is the basis for sustaining the life processes of all plants.

Grana are absent in the chloroplast of algae.They have starch-accumulating structures called pyrenoids.

Air is the largest reservoir of nitrogen.