Question

Which family plants are rich sources of proteins?
(a)Cruciferae
(b)Leguminosae
(c)Liliaceae
(d)Compositae

Answer 1

Hint: Protein is an essential part of our diet and very important for the growth and development of our body. Some plants provide us a vegetarian source of protein instead of meat and it has become very popular in current time as most people are taking up the vegan trend.

Complete answer:
Leguminosae or Fabaceae is the family of the plant which is very rich in proteins. These are mostly for human and animal consumption as it is a very rich source of protein. Some examples of legumes include beans, peas, chickpeas, soybean, etc.

Additional Information: Leguminosae plants are characterized by nitrogen fixation in their root nodules by the nitrogen fixer bacteria such as rhizobia. Usually, the seeds of these plants are used as food and these are known as pulse. These plants have many uses because of their nutritional value. They are used as food as well as pharmaceutical, forage, and even for dye and gum production. Humans consume their seeds whole as a pulse or grain or produce oil from them. The grains have very high nutritional value e.g. 100g of cooked chickpeas contains 18% DV of protein, 30% DV of fiber, 43% DV of folate, and 52% DV of manganese.
So, the correct answer is ‘Leguminosae’.

Note: Rhizobia like bacteria which can fix atmospheric nitrogen in the plant root nodules are found abundantly in the roots of Leguminosae plants. There the bacteria fix the molecular N2 from the atmosphere to ammonia which later converted to ammonium. This nitrogen fixation is what makes these plants rich in proteins as all proteins are made of nitrogenous amino acids. Therefore, these bacteria are very important for Leguminosae plants.