List I | List II | ||
---|---|---|---|
A | Nucleolus | I | Site of formation of glycolipid |
B | Centriole | II | Organization like the cartwheel |
C | Leucoplasts | III | Site for active ribosomal RNA synthesis |
D | Golgi apparatus | IV | For storing nutrients |
The correct matching of cell organelles with their functions is as follows:
A. Nucleolus: The nucleolus is the site for active ribosomal RNA synthesis (A-III).
B. Centriole: The centriole has a cartwheel-like structure and plays a role in organizing microtubules during cell division (B-II).
C. Leucoplasts: Leucoplasts are specialized plastids that store nutrients like starch (C-IV).
D. Golgi apparatus: The Golgi apparatus is involved in the formation of glycolipids (D-I).
Thus, the correct match is (4) A-III, B-II, C-IV, D-I.
Column-I | Column-II | ||
1. | Hypertonic | p. | Two molecules move in the same direction across the membrane. |
2. | Capillarity | q. | External solution is more concretrated than cell sap. |
3. | Symport | r. | Water loss in the form of droplets. |
4. | Guttation | s. | Ability of water to rise in thin tubes. |
The following diagram shown restriction sites in E. coli cloning vector pBR322. Find the role of ‘X’ and ‘Y’gens :