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When the phage DNA enters a bacterium, it protects itself from the viral DNA with the help of:
| 1. | methylases | 2. | endonucleases |
| 3. | exonucleases | 4. | ligases |
Subtopic: Â Restriction Enzymes - Main Enzymes |Â Restriction Enzymes: Historical Background |
Level 3: 35%-60%
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What is the problem in providing a bone marrow transplant to a patient of SCID as a treatment?
1. rejection of the graft by the recipient
2. graft-versus-host disease
3. cardiovascular failure
4. anaphylaxis
Subtopic: Â Restriction Enzymes - Main Enzymes |Â Transforming Plant & Animal Cell |Â Obtaining Copy of Gene from Donor DNA |Â Restriction Enzymes: Historical Background |
Level 4: Below 35%
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Cohen and Boyer constructed one of the first genetically engineered chimeras, pSC101. They introduced in this plasmid the gene of Xenopus laevis that coded for:
| 1. | cytochrome c | 2. | haemoglobin |
| 3. | keratin | 4. | rRNA |
Subtopic: Â Restriction Enzymes: Historical Background |
Level 3: 35%-60%
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