| List I | List II | ||
| A. | Genetically modified organism | I. | Agrobacterium tumefaciens |
| B. | Thermostable DNA polymerase | II. | Bt cotton |
| C. | Ti plasmid | III. | Thermus aquaticus |
| D. | pBR322 | IV. | Escherichia coli |
| A. | An offspring formed from the union of a sperm and an egg, develops as a female (queen or worker). |
| B. | An unfertilized egg develops as a male by parthenogenesis. |
| C. | A male has half the number of chromosomes than that of a female. |
| D. | Males produce sperm by meiosis. |
| E. | Honeybees have a haplodiploid sex-determination system. |
| 1. | A, B, C and E only | 2. | A, B, C and D only |
| 3. | B, C, D and E only | 4. | A, B, D and E only |
| List I (Growth Regulator) |
List II (Function/Effect) |
||
| A. | 2,4-D | I. | Brewing industry |
| B. | GA3 | II. | Stimulation of stomatal closure |
| C. | Kinetin | III. | Herbicide |
| D. | ABA | IV. | Nutrient mobilisation |
| 1. | The current species extinction rates are far lower than those in previous episodes. |
| 2. | The present species extinction rates are 100 to 1000 times faster than in the pre-human times. |
| 3. | The present net species extinction rate is zero. |
| 4. | The current species extinction rate is nearly 10 times faster than that in previous episodes. |
| A. | Microspore tetrads |
| B. | Sporogenous tissue |
| C. | Pollen grains |
| D. | Pollen mother cells |
| 1. | A, D, C, B | 2. | D, A, C, B |
| 3. | B, D, C, A | 4. | B, D, A, C |
| A. | They are called molecular scissors. |
| B. | These are the enzymes responsible for restricting the growth of bacteriophages in E. coli. |
| C. | They cut the DNA only at the centre of the palindromic sites. |
| D. | They remove nucleotides only from the ends of DNA fragments. |
| E. | They recognise specific palindromic base-pair sequences. |
| 1. | C and D only | 2. | A and E only |
| 3. | D and E only | 4. | A and B only |