| Assertion (A): | The nucleus is the control centre of the cell and contains the genetic material (DNA). |
| Reason (R): | The nucleus directs protein synthesis through messenger RNA (mRNA) molecules. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
| I: | Middle lamella is made up of calcium pectate. |
| II: | Primary wall is capable of growth. |
| III: | Secondary wall is formed on the inner [towards membrane] side of the cell. |
| 1. | Mesosomes help in DNA replication and distribution to daughter cells. |
| 2. | Gram staining is based on the difference in the composition of cell wall of different bacteria. |
| 3. | The axonemal microtubular arrangement in prokaryotes is characterized as 9 + 2. |
| 4. | Plasmids are extrachromosomal circular double stranded DNA molecules. |
| 1. | It synthesizes proteins that regulate cellular functions. |
| 2. | It selectively allows substances to enter and exit the cell, maintaining the internal environment. |
| 3. | It provides structural support to maintain the shape and integrity of the cell. |
| 4. | It stores genetic material and coordinates cell division. |
| 1. | control the entry and exit of substances |
| 2. | provide structural support and protection |
| 3. | conduct photosynthesis |
| 4. | store genetic information |
| Column I | Column II | ||
| 1. | Chloroplast | A. | Protein synthesis |
| 2. | Peroxisome | B. | Photosynthesis |
| 3. | Nucleolus | C. | Detoxification |
| 4. | Centrosome | D. | Cell division |
| I. | All living organisms are composed of cells. |
| II. | The cell is the basic unit of life. |
| III. | All cells come from pre-existing cells through sexual reproduction. |
| Column I | Column II | ||
| A | Lysosomes | P | Membrane bound organelle formed by growth and division from pre-existing organelles and/or by de novo synthesis and further maturation from the ER. |
| B | Peroxisome | Q | Oxidative phosphorylation |
| C | Mitochondria | R | membrane bound vesicular structures formed by the process of packaging in the Golgi apparatus |
| D | Chloroplasts | S | Photophosphorylation |
| A | B | C | D | |
| 1. | P | R | S | Q |
| 2. | P | R | Q | S |
| 3. | R | P | S | Q |
| 4. | R | P | Q | S |
| Statement I: | Larger and more numerous nucleoli are present in cells actively carrying out lipid synthesis. |
| Statement II: | RER is frequently observed in the cells actively involved in protein synthesis and secretion. |
| I: | All cells have a true nucleus. |
| II: | There is a cell membrane around all living cells. |
| III: | All cells have a cell wall. |
| IV: | The cell membrane controls what the cell will look like and how it behaves. |
| V: | The nucleus controls what passes into and out of a cell. |