Which microscopy can be used for viewing live cells and unstained tissues?

1. Fluorescence microscopy

2. Phase contrast microscopy

3. Dark field microscopy

4. Differential interference microscopy

5. Confocal microscopy

Which of the above combinations of microscopy is correct?

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#Question id: 15168

#Part-B Specialized Branches in Biotechnology

Cyanobacteria comprises a large and morphologically heterogenous group of

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#Question id: 1559

#Part-B Specialized Branches in Biotechnology

Which of cytokine is responsible for Class Switch IgM into IgE

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#Question id: 12942

#Part-A Aptitude & General Biotechnology

Name a single - stranded uracil containing vector which is grown in a selectable host deficit of the enzymes.

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#Question id: 15179

#Part-A Aptitude & General Biotechnology

Escherichia coli, Neisseria gonorrhoeae, Trichomonas vaginalis bacterias are examples of

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#Question id: 21731

#Part-B Specialized Branches in Biotechnology

The smog constituent peroxyacetyl nitrate (PAN) dissociates into peroxyacetyl radicals and NO2(g) in a first order reaction with a half-life of 32 min. 

If the initial concentration of PAN in an air sample is 2.7×10¹⁵ molecules/L, what will be the concentration 2.24 h later?