Statement (1) is incorrect. Separated DNA fragments are visualized after staining with a compound like ethidium bromide, followed by exposure to UV radiation. Pure DNA fragments are not directly visible under UV light without staining. The other statements are correct.
Match the LIST I (Enzyme) with LIST II (Catabolic Products)
| LIST-I | LIST-II | ||
|---|---|---|---|
| (Enzyme) | (Catabolic Products) | ||
| A | \(\beta\)-galactosidase | III | Galactose + glucose |
| B | Lecithinase | I | Choline + H$_3$PO$_4$ + fat |
| C | Urease | IV | CO$_2$ + NH$_3$ |
| D | Lipase | II | Glycerol + fatty acids |
A constant voltage of 50 V is maintained between the points A and B of the circuit shown in the figure. The current through the branch CD of the circuit is :
The output (Y) of the given logic implementation is similar to the output of an/a …………. gate.
What is Microalbuminuria ?

In the above represented plasmid an alien piece of DNA is inserted at the EcoRI site. Which of the following strategies will be chosen to select the recombinant colonies?