#Question id: 273
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 12076
#Unit 7. System Physiology – Animal
#Question id: 23586
#Unit 13. Methods in Biology
#Question id: 4375
#Unit 3. Fundamental Processes
Protein X is found to bind to a certain geneʹs promoter only when substance A is not present. The gene can be transcribed in the presence of both X and A. It is not transcribed in the presence of X alone. Protein X is a/an __. Substance A is a/an __.
#Question id: 28207
#Unit 5. Developmental Biology
The process in which a polarized stationary epithelial cell, which normally interacts with basement membrane through its basal surface, becomes a migratory mesenchymal cell that can invade tissues and form organs in new places, this process is called___