Consider the following statements:
1. Castor bean is known for the fatal ricin poisoning
2. In coconut plant, while mesocarp is the source of Coconut Coir, the edible part is endocarp
3. In Litchi, the edible part is seed coat
4. The roots of Glycyrrhiza glabra are the source of Mulethi or Liquorice
Which among the above statements is / are correct?

Answer: [D] 1, 2, 3 & 4

Ricin is a toxin that is fatal to humans in extremely small doses. Just 1 milligram is a deadly amount if inhaled or ingested, and only 500 micrograms of the substance would kill an adult if it were injected (CDC).  Ricin comes from the castor bean plant (Ricinus communis) — it is present in the mash that is left over after grinding castor beans into oil. It can be delivered as a powder, a mist or a pill. Ricin is a ribosome-inactivating protein — it irrevocably damages the ribosomes that carry out protein synthesis in cells. The ribosome-inactivating proteins found in the castor bean plant are extremely powerful, and ricin poisoning can do serious  damage to major organs.

All the statements are correct in this question.

This question is a part of GKToday's Integrated IAS General Studies Module