Sigma factors present in bacteria are proteins required to:

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#Question id: 2383

#Unit 2. Cellular Organization

Some are thin areas where the primary wall is not covered by a secondary wall and are populated with plasmodesmata known as

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#Question id: 33104

#Unit 1. Molecules and their Interaction Relevant to Biology

What can be best concluded from the given figure

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#Question id: 14836

#Unit 5. Developmental Biology

In the case of the French flag model. we assume a source of morphogen at one end and a sink at the other and that the concentrations of morphogen at both ends are kept constant but are different from each other. If the cells can respond to threshold concentrations of the morphogen, Thresholds can represent the

a. amount of morphogen that must bind to receptors to activate an intracellular signaling system. 

b. concentrations of transcription factors required to activate particular genes.

c. concentration at any point effectively provides positional information.

d. amount of morphogen that must bind to receptors to inactivate an extracellular signaling system.

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#Question id: 31298

#Unit 5. Developmental Biology

Drosophila Sog protein is a homologue of which protein in amphibians ?

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#Question id: 21394

#Unit 12. Applied Biology

Which one of the following catalyze biological reactions?