The principal components of the plasma membrane are lipids (phospholipids and cholesterol), proteins, and carbohydrates. The plasma membrane protects intracellular components from the extracellular environment. The plasma membrane mediates cellular processes by regulating the materials that enter and exit the cell.
Members of the Shudra caste, for example, are relegated to performing hard physical work regardless of their skill, intelligence, or ambition. Those born into the Brahman caste must attend university or become a member of the clergy, even though they may show no interest or aptitude toward that end.
Islamic Caste System in Indian Sub Continent. The roots of Islamic caste system in India can be traced to the 14th century decree called Fatwa-i-Jahandari of Ziauddin Barani who was the official cleric of the Tughlaqs. The decree introduced a formal division of Ashraf and Ajlaf in the Muslim society of India.anu Smriti gives the name of a caste of this composition as Kshaatri instead of Kshatriya. The word Khatri accordingly may have originated from Kshaatri instead of Kshatriya. Rajputs, the bonafide Hindu Kshatriya caste, disown all connection with them and treat them same as one of the Baniya castes.