Introns in nuclear pre-mRNAs are excised by:

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#Question id: 23145

#SCPH06 I Botany

A chemical is said to be fluorescent if it absorbs light at one wavelength (excitation) and emits light (fluoresces) at a specific 

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#Question id: 23146

#SCPH06 I Botany

A phenomenon of absorption of light at a certain wavelength and then emission at longer wavelength is known as

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#Question id: 23147

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In fluorescence microscopy why the fluorescence occurs at longer wavelength when there shorter   wavelength of light is applied?

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#Question id: 23148

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There are two proteins A and B to be visualized under fluorescence microscopy. Both of them are excited with same wavelength of light but A emits longer wavelength. Hence we can conclude that 

1. A is denser molecule than B

2. B is denser molecule than A

3. A is lighter molecule than B

4. B is lighter molecule than A

Which of the following option is incorrect?

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#Question id: 23149

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In fluorescence microscopy a usually used fluorochrome that is fura-2 is sensitive to which ions?

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#Question id: 23150

#SCPH06 I Botany

How fura-2 dye moves inside the cell through plasma membrane?