Home
Class 12
BIOLOGY
[A] : AIDS is called death warrant . [...

[A] : AIDS is called death warrant .
[R] : AIDS virus has a liking for T-lymphocytes which produce antibodies .

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • TRANSPORT IN PLANTS

    TRUEMAN BIOLOGY|Exercise Multiple Choice Questions|197 Videos

Similar Questions

Explore conceptually related problems

Assertion (A): A person who has received a cut and is bleeding needs to be given antitetanus treatment. Reason(R): Antitetanus injection provides immunity by producing antibodies for tetanus.

What is the mechanism by which the AIDS virus causes deficiency of the immune system of the infected person ?

T-cells are lymphocytes which produce the cellular immunity. These are developed from

[A] : Sedimentation , a process that has been going on since the earth was formed can not take place on land or in bodies of water . [R] : Weathering and erosion of rocks produces an accumulation of particles that are similar in size and nature and are called sediment.

[A] : AIDS virus is highly mutable [R] : It lacks DNA polymerase to repair its mutated genome

Which of the following are the reason(s) for Rheumatoid arthritis? Choose the correct option. (i) Lymphocytes becomes more active (ii) Body attacks self cells (iii) More antibodies are produced in the body (iv) The ability to differentiate pathogens or foreign molecules from self cells is lost

Which of the following are the reason(s) for Rheumatoid arthritis?Choose the correct option: (i)Lymphocytes becomes more active. (ii)Body attacks self-cells. (iii)More antibodies are produced in the body. (iv)The ability to differentiate pathogens or foreign molecules from self-cells is lost.

[A] : In the embryos liver is haemopoietic, it produces red blood corpuscles . The breakdown products of haemoglobin of destroyed RBCs are converted into bile pigment to be eliminated with faeces. [R]: The main function of liver is secretion of bile, which has bile pigments, cholesterol and lecithin.

TRUEMAN BIOLOGY-Viruses -ASSERTION AND REASON
  1. [A] : Viruses are not included in any kingdom of classification . [R...

    Text Solution

    |

  2. [A] : Viruses are easily killed by strong broad spectrum antibiotics ....

    Text Solution

    |

  3. [A] : Outside the host , viruses do not survive . [R] : Viruses are ...

    Text Solution

    |

  4. [A] : AIDS virus is highly mutable [R] : It lacks DNA polymerase to...

    Text Solution

    |

  5. [A] : Infective part of virus is its nucleic acid . [R] : During inf...

    Text Solution

    |

  6. [A] : Viruses are exception to cell theory . [R] : Viruses don't hav...

    Text Solution

    |

  7. [A] : SARS Originated in China . [R] : China is most crowded country...

    Text Solution

    |

  8. [A] : Bluebird is a disease of poultry of humans . [R] : Bludbird is...

    Text Solution

    |

  9. [A] : Viruses are not considered organisms . [R] : Viruses lack cyto...

    Text Solution

    |

  10. [A] : Viruses lack any kind of enzymatic machinery . [R] : They can ...

    Text Solution

    |

  11. [A] : Viruses are causative organisms of measles and rabies . [R] : ...

    Text Solution

    |

  12. [A] : Viruses are not considered organisms . [R] : Viruses are mere...

    Text Solution

    |

  13. [A] : All RNA viruses cannot directly multiply in host cells . [R] :...

    Text Solution

    |

  14. [A] : Some viruses cause cancer . [R] : Cancer viruses trigger uncon...

    Text Solution

    |

  15. [A] : Viruses are obligate parasites . [R] : Both DNA and RNA are pr...

    Text Solution

    |

  16. [A] : Subviral infectious agents are called viroids . [R] : Viroids ...

    Text Solution

    |

  17. [A] : The Phages which caused lysis of bacterial cell are called virul...

    Text Solution

    |

  18. [A] : AIDS is called death warrant . [R] : AIDS virus has a liking f...

    Text Solution

    |

  19. [A] : Virion is the virus particle outside the host cell. [R] : They...

    Text Solution

    |

  20. [A] : Virus free plants can be produced from virus infected plants by ...

    Text Solution

    |