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TLS Online TPP Program
#Question id: 15298
#Unit 5. Developmental Biology
In mammalian development Prior to blastocyst formation, each embryonic blastomere expresses ________ transcription factors and appears to be capable of becoming either ICM or trophoblast.
TLS Online TPP Program
#Question id: 15299
#Unit 5. Developmental Biology
Name of transcription factor which are responsible for pluripotency of stem cells or stimulate the production of OCT4 and NANOG ;
TLS Online TPP Program
#Question id: 15300
#Unit 5. Developmental Biology
In hippo signaling pathway, the activation of the Cdx2 gene in the trophoblast cells appears to be regulated by the Yap protein, which in turn is a cofactor for the transcription factor Tead4. Tead4 is found in the ________blastocyst
TLS Online TPP Program
#Question id: 15301
#Unit 5. Developmental Biology
Initially, the morula does not have an internal cavity. However, during a process, cavitation, the trophoblast cells secrete fluid into the morula to create a blastocoel, these
membranes of trophoblast cells contain_______?
TLS Online TPP Program
#Question id: 15302
#Unit 5. Developmental Biology
FOXP1 is a transcription factor which stimulate the production of Oct4 and Nanog and establish pluripotency. Which of the following statements are correct regarding to the mechanism of alternative splicing of FOXP1.
A. There are two isoforms of the FoxP1 protein, One is the product of an mRNA spliced to include a particular exon, 18b, while the other splicing variant carries exon 18a.
B. When alternative splicing generates a form including exon 18b in place of 18a, the resulting isoform (FOXP1-ES) binds to a different DNA sequence and thus controls expression of a different set of genes.
C. The protein encoded by the exon 18b– carrying mRNA is called FOXP1-ES it fails to stimulate expression of OCT4 and NANOG and instead actives genes that promote differentiation.
D. The exon 18a– containing form encodes FOXP1 itself, and this has the opposite effect: this activates genes that promote dedifferentiation, and thus stimulates iPS cell formation.
TLS Online TPP Program
#Question id: 15391
#Unit 5. Developmental Biology
In the initiation of the vertebrate eyes, paired regions of the brain bulge out and approach the anterior region of -------germ layer: