Question Discussion & Solution

• The blue litmus paper will turn red when it comes into contact with an acidic solution.
• When a litmus paper is put in a solution, depending on what the solution is, the indicator will react with the solution and will change its colour.
• On the other hand, red litmus paper reacts to alkaline substances by turning blue.
• Note: Acid will turn red litmus paper to red only.No change.

The correct answer is Constellation.

• Ursa Major constellation lies in the northern sky. Its name means “the great bear,” or “the larger bear” in Latin.
• Ursa Major is the largest northern constellation and third largest constellation in the sky.
  • Its brightest stars form the Big Dipper asterism, one of the most recognizable shapes in the sky, also known as the Plough.
• Ursa Major contains seven Messier objects. It also contains 13 stars with confirmed planets.

Important Points

• The biggest known galaxy is IC 1101, which is 50 times the Milky Way's size and about 2,000 times more massive.
  • It is about 5.5 million light-years across.
• Our Sun (a star) and all the planets around it are part of a galaxy known as the Milky Way Galaxy.
  • A galaxy is a large group of stars, gas, and dust bound together by gravity. The Milky Way is made up of about 90% dark matter, the matter which cannot be seen, and about 10% “luminous matter”, or matter that we can see with our eyes.
  • The solar system lies about 30,000 light-years from the galactic centre.

Additional Information

• Sirius, also known as the Dog Star or Sirius A, is the brightest star in Earth's night sky.
• The name means "glowing" in Greek.

The correct answer is number of pixels.

• The resolution of the monitor is measured by a number of pixels on the monitor.
  • Resolution is the capability of a sensor to observe the smallest object clearly.
• Pixel is the smallest unit of an image/display that a computer is capable of printing or displaying.
  • It is the basic logical unit in digital graphics.
  • A complete image or any visible thing on a computer display is formed by a combination of pixels.
  • The resolution depends upon the size of the pixel.
  • Images with smaller pixels will have a higher resolution.

The correct answer is 7 years.

Key Points

• Dowry death is considered death from the time of marriage for 7 years.

Important Points

• A dowry case ideally should be filed within 7 years of marriage for a dowry claim to be won in court.
  • Dowry deaths are deaths of married women who are murdered or driven to suicide by continuous harassment and torture by their husbands and in-laws over a dispute about their dowry, making the women's homes the most dangerous place for them to be.
  • The Indian criminal laws were comprehensively amended to include dowry as a punishable offense.
  • Section 304B was added to the Indian Penal Code, 1860 ("IPC"), which made dowry death a specific offense punishable with a minimum sentence of imprisonment for 7 years and maximum imprisonment for life.
  • It provided that if the death of a woman is caused by burns or bodily injury or occurs in suspicious circumstances within 7 years of her marriage, and there's evidence to show that before her death, she was subjected to cruelty or harassment by her husband or his relative regarding the demand for dowry, then the husband or the relative shall be deemed to have caused her death.

The correct answer is Both 2 and 3.

Key Points

• Both mitochondria and chloroplasts  possess their own genetic material thus, they are called as semi-autonomous organelles.
• The mitochondrial DNA and plastid DNA possess genes which produce the proteins necessary for the functioning of mitochondria and chloroplasts  respectively.

• Mitochondria (sing.: mitochondrion), unless specifically stained, are not easily visible under the microscope.
• The number of mitochondria per cell is variable depending on the physiological activity of the cells.
• In terms of shape and size also, a considerable degree of variability is observed.
• Typically it is sausage-shaped or cylindrical having a diameter of 0.2-1.0µm (average 0.5µm) and length 1.0-4.1µm.
• Each mitochondrion is a double membrane-bound structure with the outer membrane and the inner membrane dividing its lumen distinctly into two aqueous compartments, i.e. the outer compartment and the inner compartment.