MCQ
Progesterone present in contraceptive pill is meant for :
- Apreventing cleavage
- ✓preventing ovulation
- Cpreventing fertilization
- Dboth (a) and (c)
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$I. X-ray$ film
$II.$ Electrophoresis
$III.$ Digestion with restriction enzyme
$IV.$ Ethidium bromide
$V.$ Radioactive probe
Choose the option having correct sequential order of these events
| S.No. | Column-I | Column-II | |
| A. | Amoebiasis | i | Teporema pallidum. |
| B. | Diphtheria | ii | Use only sterilized food and water. |
| C. | Cholera | iii | DPT vaccine. |
| D. | Syphilis | iv | Use oval rehydration therapy. |

$I.$ The bacteria Bacillusthuringiensis $(B t)$ are used to control butterfly catterpillers
$II.$ Fresh spores of $B t$ are mixed with water and sprayed on seeds such as brassicas and fruit trees
$III.$ Insect larvae, after eating these are killed by the toxin released in their gut
$IV.$ Bt toxin genes have been introduced into plants to provide resistance to pests
Which of the statements given above are correct?