Question Discussion & Solution

Explanation:

• The virus which infects the bacteria is called bacteriophage.
• Bacteriophage was discovered by Twort & Filix
• It was named bacteriophage by D. Herelle.
• A bacteriophage is generally a double-stranded DNA virus
• In QB - bacteriophage - ss RNA is present.
• In ϕ X 174 - bacteriophage - ss DNA is present.
• A bacteriophage is of two types- Non-infective phages and infective phage.

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Additional Information

• The animal virus was discovered by Loeffler & Frosch.

The correct answer is Tartaric acid.

• Tartaric acid is an organic acid that is white and crystalline.

Key Points

• It is found naturally in many fruits like grapes, bananas, tamarind, etc.
• This acid is added to foods as an antioxidant and to give its distinctive sour taste.
• Crystals and powders are prepared by a chemical process.
• It is also added to food for preservation.
• It is also a good antioxidant and is beneficial for kidneys.
• It helps to absorb minerals in the body.
• It is also helpful in controlling problems related to gases in the body.

The disease Kala-Azar is caused by the protozoan Leishmania donovani

Leishmania donovani: 

• It is a parasitic protozoan belonging to the class Mastigophora or flagellata.
• It is a human parasite that is dimorphic (i.e. shows two forms) & digenetic in nature
• It causes the disease Kala-azar or Dumdum fever by sand fly (phelobotomus)
• The disease is spread by the bite of infected sand-fly
• It can affect the Skin (Cutaneous Leishmaniasis), the mucous membrane of the mouth, throat, and nose (Mucocutaneous Leishmaniasis), Liver, lymph nodes, spleen, and bone marrow (Visceral Leishmaniasis)
• Symptoms include: Cutaneous Leishmaniasis - Skin ulcers
• Mucocutaneous Leishmaniasis - Ulcers in mouth, throat, and nose, Nosebleed, Difficulty in breathing.
• Visceral Leishmaniasis - Weakness, weight loss, loss of appetite, enlarged spleen, liver, lymph nodes, a decrease in the production of blood cells.

Diagram showing the two different forms of Leishmania donovani

Pen is necessary for the writer to write their thoughts on paper.

The correct answer is State, Central and Local bodies.

Key Points 

• The National Commission for Protection of Child Rights (NCPCR) was set up in March 2007 under the Commissions for Protection of Child Rights (CPCR) Act, 2005, an Act of Parliament (December 2005).
• National Commission for Protection of Child Rights (NCPCR) is a statutory body under the Commissions for Protection of Child Rights (CPCR) Act, 2005 under the administrative control of the Ministry of Women & Child Development, Government of India. 
• The Commission's Mandate is to ensure that all Laws, Policies, Programmes, and Administrative Mechanisms are in consonance with the Child Rights perspective as enshrined in the Constitution of India and also the UN Convention on the Rights of the Child.
• The Child is defined as a person in the 0 to 18 years age group.
• National Commission for Protection of Child Rights (NCPCR) works at State, Central and Local bodies. 
• Independent monitoring of the implementation of the Act is assigned to the National Council of Protection of Child Rights (NCPCR), the main responsibilities are:
  • examine and review safeguards for rights under this Act, and recommend measures for effective implementation
  • inquire into complaints relating to child’s right to free and compulsory education
  • conduct periodic social audit of the status of implementation and review
• Hence, the National Commission for Protection of Child Rights (NCPCR) works at ​State, Central and Local bodies.