MCQ
The usual shape of growth curve is
- ALinear
- BInverted bell-shaped
- ✓Sigmoidal
- DZig-zag
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| Column I | Column II |
| (i) Dodo | (A) Africa |
| (ii) Quagga | (B) Russia |
| (iii) Thylacine | (C) Mauritius |
| (iv) Stellar's sea cow | (D) Australia |
$i.$ Glucose or galactose may bind with the repressor and inactivate it.
$ii.$ In the absence of lactose, the repressor binds with the operator region.
$iii.$ The z-gene codes for permease.
$iv.$ This was elucidated by Francois Jacob and Jacque Monod.
$\begin{array}{|p{0.3\linewidth}|p{0.6\linewidth}|} \hline Column\,\,-I & Column\,\,-II \\ \hline A.\,\,Ethaphon & P.\,\,Inhibits\,\,seed\,\,germination \\ \hline B.\,\,ABA & Q.\,\,They\,\,all\,\,are\,\,acidic \\ \hline C.\,\,GA & R.\,\,Help\,\,over\,\,come\,\,the\,\,apical\,\,dominance \\ \hline & S.\,\,Hastens\,\,fruit\,\,ripening\,\,in\,\,tomatoes\,\,and\,\,apples. \\ \hline \end{array}$