STD 12 - 7. human health and disease — BIOLOGY STD 12 Science — Question

$i.$ 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.

$(I)$ Majority of flowering plants use a range of animals as pollinating agents.

$(II)$ Among the animals, insects particularly flies are the dominant biotic pollinating agents.

$(III)$ Majority of insect pollinating flowers are small and less colorful.

$(IV)$ The body of the animal gets a coating of pollen grains, which are generally sticky in animal pollinated flowers.