MCQ
In lac operon, $z$ gene codes for:
- ✓$\beta$-galactosidase
- BPermease
- CRepressor
- DTransacetylase
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| Primary sludge | Activated sludge |
| (i) It is sludge formed during primary-sew-age treatment | It is sludge formed during secondary sewage treatment |
| (ii) It possesses floes of decomposer microbes | It does not posses floes of decomposer microbes |
| (iii) It does not require aeration | Formation of activated sludge requires aeration |
| (iv) A lot of decomposition occurs during formation of primary sludge | Very little decomposition occurs during formation of activated sludge |