MCQ
Identify $X$ in figure.
- ASeed coat
- BRadicle
- ✓Endosperm
- DEmbryo
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$(i)$ It causes potato spindle tuber disease.
$(ii)$ It has free $RNA.$
$(iii)$ Molecular weight of $RNA$ is low. Identify the infections agent.
$i.$ 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.
$1.$ Thick wall.
$2.$ Intercellular space is present.
$3.$ Impervious to gaseous exchange.
$4.$ Contain grana.
$5.$ Contain thyllakoid.
$R$- The microspores are arranged in a cluster of four cells - the microscopic tetrad.