Defence GK Questions 2026

It is a Directive Principle that requires the State to secure a legal system which promotes justice on the basis of equal opportunity, and in particular to provide free legal aid by suitable legislation or schemes so that no citizen is denied the opportunity to secure justice by reason of…

The Supreme Court held that where a legal wrong is caused to a person or a class of persons who cannot approach the court because of poverty, disability or a socially disadvantaged position, any member of the public acting in good faith may move the court on their behalf.

Decided in 1979, it arose from a newspaper report on undertrial prisoners in Bihar who had been in jail awaiting trial for longer than the maximum sentence their alleged offences carried.

Habeas corpus is Latin for you may have the body. A High Court under Article 226, and the Supreme Court under Article 32, issues it to the person or authority holding someone in custody, ordering that the detenu be produced before the court so that the legality of the detention…

If gametes carried the full chromosome number, fertilisation would double it in every generation. Meiosis halves the number when gametes are formed, so that the union of two gametes restores the original diploid number and keeps it constant from one generation to the next.

His detailed drawings of the stages are the basis of the account still given in textbooks.

Interphase occupies more than ninety-five per cent of the duration of the cell cycle, because in it the cell must grow to a sufficient size, synthesise proteins and RNA, duplicate its entire DNA and prepare the structures needed for division.

This single difference is the reason meiosis I is called the reduction division. In anaphase I the two homologous chromosomes of each bivalent are pulled to opposite poles, but each of them still consists of two sister chromatids joined at an undivided centromere.

In the zygotene sub-stage of prophase I the two members of each pair of homologous chromosomes come to lie side by side along their whole length, matching point for point, and the structure that forms between them and holds them together is called the synaptonemal complex.

By this sub-stage the homologous chromosomes have already paired in zygotene and are held together as bivalents or tetrads, each made of four chromatids.

Meiosis begins with a single round of DNA replication and is then followed by two successive nuclear divisions. Meiosis I is the reduction division, in which homologous chromosomes separate and the two cells formed already carry half the parental chromosome number.

An animal cell divides its cytoplasm by a cleavage furrow, in which the plasma membrane is pulled inward around the middle until the cell is pinched into two.

Once the chromosomes are aligned on the metaphase plate and every kinetochore is attached to a spindle fibre, the centromere holding the two sister chromatids together splits.

In this stage the condensed chromosomes, each consisting of two sister chromatids, are moved by the spindle fibres until their centromeres lie in one plane across the middle of the cell, known as the metaphase plate or equatorial plate.

In mitosis each centromere splits in anaphase and one chromatid of every chromosome goes to each pole, so the two daughter cells receive exactly the same number of chromosomes as the parent cell had, and exactly the same genetic information.

During this phase the DNA of the cell is copied so that the amount of DNA in the nucleus doubles, while the number of chromosomes remains unchanged because each chromosome now simply consists of two identical sister chromatids joined at the centromere.

Evaporation is the escape of molecules from a liquid surface into the air, and it slows as the air above fills with vapour; when the humidity falls the air can hold more vapour, so the rate of evaporation rises.

High clouds such as cirrus are thin and made of ice crystals; they let most of the sunlight pass through but absorb the outgoing infrared radiation from the surface, so their net effect is to warm.

In convection the heated matter itself moves and carries its energy with it: air near a warm surface expands, becomes lighter, rises as a current and is replaced by cooler air sinking in its place, and the same happens in a pan of boiling water.

An isotherm joins places of equal temperature, and on a world map the isotherms run roughly east to west, parallel to the latitudes, bending sharply where a continent meets an ocean because land and water heat at different rates.