SSC GD Constable GK Questions 2026

Each kidney contains about a million nephrons, and each nephron consists of a Bowman's capsule enclosing a knot of capillaries called the glomerulus, followed by a tubule in which useful substances are reabsorbed; together they filter the blood and form urine.

The islets of Langerhans are patches of endocrine tissue in the pancreas, and their beta cells secrete insulin, which lowers the level of glucose in the blood by helping cells take it up and by storing the surplus as glycogen; a lack of insulin causes diabetes mellitus.

The cerebellum lies behind and below the cerebrum and coordinates voluntary muscular activity, so it keeps the body balanced and the posture steady; damage to it causes a staggering walk even though the muscles are strong.

The Austrian scientist Karl Landsteiner discovered the A, B and O blood groups in 1901 and received the Nobel Prize for Physiology or Medicine in 1930 for the work; he was also associated with the discovery of the Rh factor, named after the rhesus monkey.

Red blood cells are produced in the red bone marrow, lose their nucleus on maturing and survive roughly four months, after which they are broken down in the spleen, which is accordingly called the graveyard of red blood cells; the iron released from their haemoglobin is used again.

The sino-atrial node is a small patch of specialised muscle tissue in the wall of the right atrium near the opening of the superior vena cava, and it generates the impulse that sets the rate of each heartbeat without any outside stimulus, which is why it is called the pacemaker.

The liver weighs about one and a half kilograms and is both the largest gland and the largest internal organ of the body; it secretes bile, stores glycogen, iron and vitamin A, converts ammonia into urea and detoxifies drugs and poisons.

The adult human skeleton has 206 bones, of which 80 belong to the axial skeleton, that is the skull, vertebral column and chest, and 126 to the appendicular skeleton of the limbs and girdles.

The stapes, shaped like a stirrup, is the innermost of the three ossicles of the middle ear and is the smallest bone in the human body, measuring only a few millimetres; the smallest muscle of the body, the stapedius, is attached to it.

The three word motto, faster, higher, stronger, was coined by Father Henri Didon and taken up by Pierre de Coubertin for the modern games; in 2021 the International Olympic Committee added the fourth word so that the motto now reads faster, higher, stronger, together, to stress solidarity along with individual…

The ILO was set up in 1919 under the Treaty of Versailles, became the first specialised agency of the United Nations in 1946, has its headquarters at Geneva and works on a tripartite basis with governments, employers and workers.

The phrase, for the good of the many and the happiness of the many, comes from Buddhist usage and fits a broadcaster that reaches almost the whole population in many languages; All India Radio took its present name in 1936 and Akashvani was adopted in 1957.

Its motto, meaning the true, the auspicious and the beautiful, is the line that accompanied its familiar logo for decades.

The DRDO was formed in 1958 and works under the Ministry of Defence, developing missiles, radars, armoured vehicles, torpedoes and other defence systems, and its crest carries this Sanskrit line about science being the root of strength.

The service was raised in 1978 and works under the Ministry of Defence, guarding the maritime zones, enforcing fisheries and anti smuggling law and running search and rescue at sea, so the plain promise of Vayam Rakshamah, we protect, is apt.

The line comes from the Mahabharata and appears on the emblem of the Court, which shows the wheel of dharma with the lions of the Ashoka capital.

Sam No Varunah is a Sanskrit prayer from the Taittiriya Upanishad that Varuna, the lord of the waters, be auspicious unto us, which is the natural choice for a sea service, and it is written on the naval crest under the anchor.

The phrase is drawn from the eleventh chapter of the Bhagavad Gita, where the cosmic form touches the sky, and it suits an air arm exactly; it appears on the Air Force crest below the Himalayan eagle.

The line declares that truth alone triumphs, and it was chosen as the motto of the Republic and inscribed in the Devanagari script on the abacus of the State Emblem of India.

A microlith is a very small blade, usually one to five centimetres long, that was fixed into a handle of wood or bone to make a composite tool such as an arrow, a harpoon or a sickle, and it is the defining tool of the Middle Stone Age at sites…