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.
List - I | List – II | ||
A. | Primary structure of protein | i. | Human haemoglobin |
B. | Secondary structure of protein | ii. | Dispulphide bonds |
C. | Tertiary structure of protein | iii. | Polypeptide chain |
D. | Quaternary structure of protein | iv. | \(Alpha\ helix\ and\ \beta\ sheet\) |
List I | List II | ||
---|---|---|---|
A | Mesozoic Era | I | Lower invertebrates |
B | Proterozoic Era | II | Fish & Amphibia |
C | Cenozoic Era | III | Birds & Reptiles |
D | Paleozoic Era | IV | Mammals |