MCQ
Immunity tolerance developed by
- ✓Interaction with the antigen
- BBy giving antibodies
- CPresent by birth
- DBy giving antibiotics
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$I.$ Eco. $RI$ restriction endonuclease enzyme is isolated from Escherichia coli $RY13$
$II.$ Its recognition sequence is $5^{\prime}-$ $GAATTC - 3 '$
$3^{\prime}-C T T A A G-5^{\prime}$
$5^{\prime}-G-A-A-T-T-C-3^{\prime}$
$3^{\prime}-C-T-T-A-A-G-5^{\prime}$
$III.$ Its site of cleavage is
| Method | Mode of Action |
| $(A)$ The pill | $(i)$ Prevents spermsreaching cervix |
| $(B)$ Condom | $(ii)$ Prevents implantation |
| $(C)$ Vasectomy | $(iii)$ Prevents ovulation |
| $(D)$ Copper $T$ | $(iv)$ Semen contains no sperms |