This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
Movement of protein from nucleus to cytoplasm can be seen by: 
Select and explain. 
A. FISH, B. FRAP, C. Confocal microscopy, D. DNA microscopy
B: FRAP
Answer: B: FRAP 
Explanation: Ans. B. FRAPFRA Pisa technique used to study Fluid mosaic model of cell membrane, movement of proteins etc.FRAP is fluorescence recovery after photobleachingThe techniqueFlourescent dyes emit coloured light when it is illuminated, but if a very high intensity light is used then the sedyes are unable to fluorescence. Otherwise called photo bleached. Later it recover fluorescenceThis recovery after photobleaching is used to study movement of proteins lipids carbohydrates, etc.