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TLS Online TPP Program

#Question id: 15417

Sequence of amphibian lens induction postulated by experiments on embryos of the frog Xenopus laevis ; EXCEPT

#Unit 5. Developmental Biology
  1. Unidentified inducers (possibly from the foregut endoderm and cardiac mesoderm) cause the synthesis of the Otx2 transcription factor in the head ectoderm during the late neurula stage.
  2. As the neural folds rise, inducers from the anterior neural plate (including the region that will form the retina) induce Pax6 expression in the anterior ectoderm that can form lens tissue.
  3. As the neural folds rise, inducers from the anterior neural plate (including the region that will form the retina) induce Pax6 expression in the anterior ectoderm that can form lens tissue.
  4. The optic vesicle secretes BMP and FGF family paracrine factors, which induce the synthesis of the Sox transcription factors and initiate observable lens formation
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TLS Online TPP Program

#Question id: 33152

#Unit 2. Cellular Organization

Which of the following process prevents the opening of the cohesion ring, thereby locking the cohesin ring around the sister chromatids?
TLS Online TPP Program

#Question id: 33153

#Unit 2. Cellular Organization

Activation of APC/C depends primarily on association with one of two activating subunits (Cdc20 or Cdh1), because:
TLS Online TPP Program

#Question id: 33154

#Unit 2. Cellular Organization

Which of the following statement is not correct regarding positive feedback mechanism in the activation of M-Cdk?
TLS Online TPP Program

#Question id: 33155

#Unit 2. Cellular Organization

Which of the following statement is correct regarding the phosphorylation on T14 and Y15?
TLS Online TPP Program

#Question id: 33156

#Unit 2. Cellular Organization

Which of the following statement is not correct  regarding Sequential activation of the APC/C by Cdc20 and Cdh1?
TLS Online TPP Program

#Question id: 33227

#Unit 1. Molecules and their Interaction Relevant to Biology

An uncatalyzed keto– enol tautomerization reaction occurs quite slowly as a result of the high free energy of its carbanion-like transition state called as