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TLS Online TPP Program

#Question id: 1739

Cross-linking of B-cell surface receptors:

#XL - Q Biochemistry

  1. Is a characteristic feature of thymus-dependent antigens

  2. Lowers the intracellular Ca2+ concentration

  3. Rapidly phosphorylates the Ig-α and Ig-β chains of the surface Ig receptor

  4. Requires contiguity of two B-cell epitopes of different specificity on the same antigen molecule

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TLS Online TPP Program

#Question id: 11581

#XL - T Zoology

DES is called an "endocrine disrupting chemical" because it interferes with the endocrine secretions of the ________.
TLS Online TPP Program

#Question id: 20142

#XL - P Chemistry

Energy equivalent of 10.00 cm–1 is
TLS Online TPP Program

#Question id: 12687

#General Aptitude

 If the diagonals of two squares are in the ratio of 2 : 5, their area will be in the ratio of
TLS Online TPP Program

#Question id: 4585

#XL - S Microbiology

The cow Bos primigenius (which is bred for meat and milk) has a smaller brain and larger eyes than closely related wild species of ungulates. These traits most likely arose by ________.
TLS Online TPP Program

#Question id: 4607

#XL - T Zoology

Members of two different species possess a similar-looking structure that they use in a similar way to perform about the same function. Which of the following would suggest that the relationship more likely represents homology instead of convergent evolution?