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26. Magnification of compound microscope is not connected with
A. Numerical aperture
B. Focal length of objective
C. Focal length of eye piece
D. Tube length
Explanation:
27. The process by which the amount of DNA, RNA and protein can be known at a time is
A. Cell fractionation
B. Autoradiography
C. Phase-contrast microscopy
D. Tissue culture
Explanation:
28. Molecules containing radio-isotopes are employed in
A. Spectroscopy
B. Autoradiography
C. Chromatography
D. Electrophoresis
Explanation:
29. Radio-tracer technique shows that DNA is
A. Single helix
B. Double helix
C. Multihelix
D. None of the above
Explanation:
30. Which one is labeled by incorporating ³H for studying RNA synthesis?
A. Cytosine
B. Guanosine
C. Thymidine
D. Uridine
Explanation: