MCQ
Group embryophyta includes
- ABryophyta
- BPteridophyta
- CSpermatophyta
- ✓All the above
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$I.$ DNA being a hydrophilic molecule cannot pass through cell membranes
$II.$ Agrobacteriumtumefaciens delivers a piece of $DNA$ known as $'Z-DNA'$ in the Tiplasmid which transforms normal plant cells into tumour cells to produce chemical against pathogens
$III.$ Retrovirus, adenovirus, papillomavirus are also now used as cloning vectors in animal because of their ability to transform normal cells into cancerous cell.
$IV.$ In genetic engineering, $DNA$ from different sources are cut with the same restriction enzymes so that both $DNA$ fragments have same kind of sticky ends
Choose the correct option
$R$ : They act on all trophic levels of a food chains.
$R$ - Cellulose is important component of plant cell wall
| Column $I$ | Column $II$ |
| ($a$) Fruit ripener | ($i$) Abscisic acid |
| ($b$) Herbicide | ($ii$) Polysaccharide |
| ($c$) Bolting agent | ($iii$) $GA _{3}$ |
| ($d$) Stress hormone | ($iv$) Ethephon |
Select the correct option from following