IAS 2002 — Technology

Match List-I (Scientists) with List-II (Achievements) and select the correct answer using the codes given below: | List-I (Scientists) | | List-II (Achievements) A. | Arber and Smith | 1. | Developed transgenic plants with Agrobacterium T-DNA B. | Feldman | 2. | Discovered endonucleases C. | Mullis | 3. | Discovered reverse transcriptase D. | Temin and Baltimore | 4. | Discovered polymerase chain reaction Codes: A B C D

With reference to the latest developments in stem cell research, consider the following statements: 1. The only source of human stem cells are the embryos at blastocyst stage. – 2. The stem cells can be derived without caisining destruction to blastocysts. – 3. The stem cells can regenerate themselves in vitro virtually forever. 4. Indian research centres also created a few cell lines which can be developed into many types of tissues. Which of these statements are correct?