Which of the following regulatory scenarios of cell-type-specific expression of fibronectin isoforms in humans is (are) consistent with information on known splicing factors?

a. A Tra-like splicing factor expressed in fibroblasts is required for inclusion of EIIIA and EIIIB exons.

b. An Sxl-like splicing factor is required in hepatocytes for exclusion of EIIIA and EIIIB exons.

c. A Tra-2-like factor enhances binding of the cleavage/polyadenylation complex in fibroblasts.

d. A Dsx-like protein is required to inhibit transcription of the fibronectin gene.

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#Question id: 630

#Unit 1. Molecules and their Interaction Relevant to Biology

In case of competitive inhibition, plots of Km against [Io] fixed [Eo] have

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#Question id: 15967

#Unit 12. Applied Biology

Which culture technique is responsible for the immature embryo rescue?

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#Question id: 7121

#Unit 5. Developmental Biology

How do the endodermal cells of the sea urchin embryo carry out gut formation during gastrulation?

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#Question id: 16319

#Unit 7. System Physiology – Animal

What is distress?

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#Question id: 7191

#Unit 5. Developmental Biology

In tunicate embryo, Presumptive endoderm originates from the vegetal A4.1 and B4.1 blastomeres. The specification of these cells coincides with the localization of β-catenin. Which of the following statement is incorrect?