MCQ
The first isolated restriction endonuclease is:
- AHind II.
- BHind III.
- CEcoRI.
- DAlu I.
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$(i)$ Bacillus thuringiensis are available in sachets as dried spores which are mixed with kerosine and sprayed on to vulnerable plants
$(ii)$ B. thuringiensis are used to control butterfly caterpillars, but leave other insects unharmed
$(iii) $ The toxin of B. thuringiensis is released in the blood of larvae and the larvae get killed
$(iv)$ By the development of methods of genetic engineering B. thuringiensis toxin genes have been introduced
| Column $- I$ | Column $- II$ |
| $(p)$ Intine | $(v)$ Long structure |
| $(q)$ Exine | $(w)$ Nutrition to pollengrain |
| $(r)$ Pollentube | $(x)$ Sporopollenin |
| $(s)$ Tapetum | $(y)$ Pectin, cellulose |
| $(z)$ Glycogen |