At the surface of B-cell contain antibody- IgM and IgD, How is the formation of IgD from IgM?

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#Question id: 28050

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following does not lead to exposure of hydrophobic amino acids on the surface of a protein?

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#Question id: 15153

#Unit 8. Inheritance Biology

In this problem we will explore some of the many ways that mutations in two different genes can interact to produce different Mendelian ratios. Consider a hypothetical insect species that has red eyes. Imagine mutations in two different unlinked genes that can, in certain combinations, block the formation of red eye pigment yielding mutants with white eyes. In principle, there are two different possible arrangements for two biochemical steps responsible for the formation of red eye pigment. The two genes might act in series such that a mutation in either gene would block the formation of red pigment. Alternatively, the two genes could act in parallel such that mutations in both genes would be required to block the formation of red pigment.

Further complexity arises from the possibility that mutations in either gene that lead to a block in enzymatic activity could be either dominant or recessive. If the crosses is made between a wild type insect with red eyes and a true breeding white eyed strain with mutations in both genes. Such considerations yield the Pathways in parallel with recessive mutations in both genes, determine the phenotype of the F1 progeny and the expected phenotypic ratio of red to white eyed insects in the F2.

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#Question id: 28401

#Unit 5. Developmental Biology

The Nieuwkoop centre is formed on the dorsal side of the embryo due to accumulation of beta-catenin which helps activate gene encoding protein, these protein known as____

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#Question id: 3935

#Unit 3. Fundamental Processes

Sequences that are removed from the primary RNA transcript in eukaryotes are called __.

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#Question id: 2189

#Unit 2. Cellular Organization

Which of the following is not true of membrane phosphoglycerides?