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TLS Online TPP Program

#Question id: 2048

Which of the following is NEVER related to poor MHC-linked immune response?

#Unit 4. Cell Communication and Cell Signaling

  1. Defective V gene rearrangement

  2. T-cell-mediated suppression

  3. Inadequate antigen processing

  4. Poor binding of peptide epitope to MHC

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TLS Online TPP Program

#Question id: 23585

#Unit 13. Methods in Biology

________ are small, circular DNA molecules used as vectors for DNA fragments up to 1-5 kb in size.
TLS Online TPP Program

#Question id: 7156

#Unit 5. Developmental Biology

Which of the following is consistent with a model for aging in which stresses leading to DNA damage cause senescence and aging?
TLS Online TPP Program

#Question id: 28216

#Unit 5. Developmental Biology

The cell retain stem cell niche and maintained their proliferative properties is referred to as___
TLS Online TPP Program

#Question id: 7205

#Unit 5. Developmental Biology

In cloning experiments on the frog xenopus laevis, nuclei were removed from intestinal cells of tadpoles and transplanted into zygotes whose nuclei had been removed. A small percent of these zygotes developed into normal frogs, suggesting that
TLS Online TPP Program

#Question id: 5134

#Unit 5. Developmental Biology

Match the following cleavage patterns with the species in which they occur.

        Species                                           Cleavage Pattern

      A. Flatworm                                       i. Meroblastic discoidal

      B. Frog                                               ii. Meroblastic superficial

      C. Birds                                              iii. Holoblastic displaced radial

      D. Insect                                              iv. Holoblastic spiral