Embryos injected with antibodies to fibronectin show inhibited movement of neural crest cells during development of the nervous system. These experiments show that:

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#Question id: 15150

#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 series with recessive mutations in both genes, the F1 progeny shows will have red eye, what is the expected phenotypic ratio of red to white eyed insects in the F2.

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#Question id: 539

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following mutases catalyze the formation of a 2,3-BPG intermediate?

A) muscle phosphoglycerate mutases

B) plant phosphoglycerate mutases

C) yeast phosphoglycerate mutases

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#Question id: 11269

#Unit 10. Ecological Principles

Following table represent Loss of energy from ingested food at different process?

What is value of A, B, C and D respectively?

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#Question id: 4384

#Unit 3. Fundamental Processes

Transcriptionally inactive genes

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#Question id: 29506

#Unit 6. System Physiology – Plant

The active principle in foxglove (Digitalis sp.) is cardinolide digitoxin  is a

a. cardiac glycoside 

b. that activate ATPase activity 

c. that inhibits ATPase activity 

d. can increase myocardial contraction

Which of the following is not true regarding digitoxin