Home
Class 12
BIOLOGY
Read the statements.I. IgE antibodies ar...

Read the statements.I. IgE antibodies are produced in an allergic reaction.II. B-lymphocytes mediate cell mediated immunity.III. The yellowishfluid colostrum has abundant IgE antibodies.IV. Spleen is a secondary lymhoid organ. Of the above statements.

A

I only is correct

B

I and ll are correct

C

ll and III are correct

D

I and IV correct

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • MODEL QUESTION PAPER 5

    SARAS PUBLICATION|Exercise EXERCISE|88 Videos

  • Model Solved Paper 2020 (3)

    SARAS PUBLICATION|Exercise EXERCISE|39 Videos

Similar Questions

Explore conceptually related problems

Consider the following statements with respect to angiosperms. I. The male sex organ in a flower is the stamen.II. The anthers following mitosis produce pollen grains.III. In an embryo sac, the Primary Endosperm Nucleus (PEN) is diploid. IV. After double fertilisation the ovules develop into seeds and ovaries develop into fruit. Of the above statements.

Read the following statements regarding spleen and select the correct option. (i) Spleen is a large oval-shaped organ which mainly contains lymphocytes and phagocytes. (ii) Spleen is a large reservoir of erythrocytes. (iii) Spleen is a primary lymphoid organ. (iv) spleen acts as a filter of the blood by trapping blood-borne microorganisms.

Read the given statements. (i) Outer exine is made up of sporopollenin. (ii) Inner intine is pecto-cellulosic in nature (iii) Generative cell is bigger and contains abundant food reserve (iv) Vegetative cell is small and floats in the cytoplasm of the generative cell. Which of the given statements are not true regarding structure of pollen grain?

Study the following statements regarding the anatomy of isobilateral leaf. (i) Stomata are equally distributed on both the surfaces (ii) certain adaxial epidermal cells are modified into bulliform cells in grasses. (iii). The vasuclar bundles are radial (iv). Phloem is adaxially placed. Which of the above statements are correct?

Read the following statements about asexual reproduction and select the correct ones. (i) It involves a single parent. (ii) It is slower than sexual reproduction. (iii) It produces progeny that are genetically identical with the parent but not with one another. (iv) The progeny of asexual reproduction can be termed as clones.

Read the following statements and select the correct option. Statement 1 : Active immunity is developed when a person's own cells produce antibodies in reponse to infection or vaccine. Statement 2 : Injection of snake antivenom against snake bite is an example of active immunisation.

Read the following statements carefully. (i) An electrostatic precipitator removes particulate matter by imposing negative charge on them. (ii) Catalytic converters convert unburnt hydrocarbons into CO_(2) and water. (iii) Peroxyacyl nitrates (PAN) is a secondary pollutant. (iv) DDT is a non-biodegradable pollutant. Which of the above statements are incorrect ?

SARAS PUBLICATION-MODEL QUESTION PAPER 6-EXERCISE
  1. The cytokine barrier among these is:

    Text Solution

    |

  2. Ringworms are caused by:I. Wuchereria,II. Microsporum,III. Haemophilus...

    Text Solution

    |

  3. Read the statements.I. IgE antibodies are produced in an allergic reac...

    Text Solution

    |

  4. The microbial biocontrol agent for butterfly caterpillar is:

    Text Solution

    |

  5. The first human-like hominid was called:

    Text Solution

    |

  6. Oparin and Haldane proposed:

    Text Solution

    |

  7. Flame cells of flatwoims help in:I. osmoregulation,II. Digestion,III. ...

    Text Solution

    |

  8. Read thestatements regarding echinoderms and choose the correct option...

    Text Solution

    |

  9. This class of animals are all ectoparasites in some fishes:

    Text Solution

    |

  10. The structure in earthworm which serves as a wedge to force open crack...

    Text Solution

    |

  11. Which among these is not involved in excretion in cockroaches?

    Text Solution

    |

  12. Frogs:

    Text Solution

    |

  13. Most of the cartilages in vertebrate embryo are replaced in adult by:

    Text Solution

    |

  14. Name the specialised connective tissue.

    Text Solution

    |

  15. The moiety present at the 5’end of ribose sugar in a polynucleotide is...

    Text Solution

    |

  16. Three alleles namely 1^ A, I^B, and i control the blood grouping in hu...

    Text Solution

    |

  17. An example for co-dominance:

    Text Solution

    |

  18. The nuclear structure observed by Henking in 50% of the insect sperm a...

    Text Solution

    |

  19. Physical-association of genes one chromosome is called:

    Text Solution

    |

  20. In the double-helical structure of DNA, the pitch of the helix is:

    Text Solution

    |