In cultured cells, which of the following mutation in the EC5 domain of CDHR3 increases the cell-surface expression of CDHR3 and the binding and replication of RV-C?

#Question id: 18778

#Unit 13. Methods in Biology

#Question id: 28368

#Unit 5. Developmental Biology

 when bicoid mRNA was added to the middle region of Bicoid-deficient embryos, that middle region develop____

#Question id: 10587

#Unit 10. Ecological Principles

The above pyramid 

Which of the following is not representation of following ecosystem?

#Question id: 2910

#Unit 2. Cellular Organization

With respect to the DNA methylation mechanism in mammalian cells, which of the following statements, if any, is true? 

I. The principal role of the DNMT1 DNA methyltransferase is in de novo methylation. 

II. The DNMT3A and DNMT3B DNA methyltransferases require hemi-methylated DNA as a substrate and are responsible for methylating nascent DNA strands that are complementary to methylated parental DNA strands.

III. Active DNA demethylation means removal of methyl groups from a hemi-methylated DNA double helix. 

IV. DNA methylation is not essential in mammalian development.

#Question id: 3830

#Unit 3. Fundamental Processes

Why is DNA damage in skin cells from exposure to excessive UV light not completely reversed by photoreactivation?