Question Discussion & Solution

The correct answer is ​Shaheed-e-Azad Bhagat Singh.

Key Points

• Shaheed-e-Azad Bhagat Singh (1954) is the first film based on Bhagat Singh’s life.
  • The movie was directed by Jagdish Gautama and had Prem Abeed, Jairaj, Smriti Biswas, and Ashita Mazumdar in lead roles.
  • The film also boasted of the classic patriotic song ‘Sarfaroshi Ki Tamanna Ab Hamaare Dil Mein Hai’ in Mohammed Rafi’s melodious voice. 
• Shaheed Bhagat Singh (1963):
  • Almost a decade later, Shammi Kapoor appeared in and as Shaheed Bhagat Singh.
  • The film was directed by KN Bansal and besides Shammi Kapoor, the movie starred Shakeela, Premnath, and Achla Sachdev in prominent roles.
• Shaheed (1965):
  • At the 13^th National Awards, the film won awards for Best Feature Film in Hindi and Nargis Dutt Award for Best Feature Film on National Integration and Best Story.
  • ‘Shaheed’ had the entire nation humming to its patriotic compositions like ‘Aye watan aye watan humko teri kasam’, ‘Sarfaroshi ki tamanna’, ‘O mera rang de basanti chola’ and ‘Pagadi sambhaal jattaa’ with the voices of Mukesh, Mohammed Rafi, Lata Mangeshkar and Manna De gracing the vocals. 
• The Legend of Bhagat Singh (2002):
  • Rajkumar Santoshi directed Ajay Devgn as Bhagat Singh and focused on how Singh came to develop his independent views against the British Raj and the development of his ideologies, right from witnessing the death of Lala Lajpat Rai to the reopening of the Saunders’ murder case.
  • The film went on to win two National Awards, including the Best Feature Film in Hindi and Best Actor for Ajay Devgn.

Systems software are programs that manage the resources of the computer system and simplify applications programming.

 Key PointsSystems software includes software such as the operating system, database management systems, networking software, translators, and software utilities.

Systems software can be categorized under the following:

• Operating system: Harnesses communication between hardware, system programs, and other applications.
• Device driver: Enables device communication with the OS and other programs.
• Firmware: Enables device control and identification.
  • Firmware is the operational software embedded within a flash, ROM, or EPROM memory chip for the OS to identify it.
  • It directly manages and controls all activities of any single hardware.
• Translator: Translates high-level languages to low-level machine codes.
  • A compiler is a computer program that translates computer code written in one programming language into another language.
  • The name "compiler" is primarily used for programs that translate source code from a high-level programming language to a lower-level language to create an executable
• software utility: Ensures optimum functionality of devices and applications.

Additional Information

• Word processor is a computer program used to write and revise documents, compose the layout of the text, and preview on a computer monitor how the printed copy will appear. For example, google docs, Microsoft word.

Hence word processor is not system software.

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.

Option - 1 - Stream - A stream is a body of water with surface water flowing within the bed and banks of a channel.

Option - 2 - Canal - Canals are waterways channels, or artificial waterways, for water conveyance, or to service water transport vehicles.

Option - 3 - Brook - A small stream.

Option - 4 - Bridge - A bridge is a structure built to span a physical obstacle, such as a body of water, valley, or road, without closing the way underneath.

All except bridge contain water.

The correct answer is four.

Key Points

• Crocodiles have four-chamber hearts. All reptiles have incomplete four-chamber hearts except Crocodiles.

Additional Information

• Endotherm or Homeotherm have well developed four-chamber heart. Examples:- Birds and mammals. 
  • They can maintain constant body temperature.
• Poikilotherm or Ectotherm do not have a well-developed heart, so they can not maintain constant body temperature. Examples:- Amphibians and reptiles.
• Fishes have a two-chamber heart.
• Amphibians have three-chamber heart.
• The cockroach has thirteen chamber hearts.