MCQ
Secretion of interferon is which type of barrier?
- APhysical barrier
- ✓Cytokine barrier
- CCellular barrier
- DPhysiological barrier
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$R$ : They act on all trophic levels of a food chains.
| Column – I | Column $- II$ |
| $(1)$ Study of disease | $(p)$ Transgenic mice |
| $(2)$ Biological products | $(q)$ Testing toxicity of drug |
| $(3)$ Vaccine safety | $(r)$ Rheumatoid arthritis |
| $(4)$ Chemical safety | $(s)\; \alpha - 1$ Antitrypsin |
$II.$ The bacteria should be made competent to accept the $DNA$ molecule
The correct option regarding the above statements is