Q. Barnase-barstar system, which is seen in the news recently, is related to which of the following?

[A] Creating environmental buffer reduce climate impacts.

[B] .Launching rockets more than 8 tonnes.

[C] Hybrid seed production technology.

[D] .Artificial communication technologies.

Answer: C
Notes:

Barnase-barstar system is an indelible technique to produce hybrid seeds in self-pollinated crops. The scientists have deployed this technology to produce Genetically Modified(GM) mustard variety DMH (Dhara Mustard Hybrid)-11.

The barnase gene codes for a protein that impairs pollen production and renders the plant into which it is incorporated male-sterile.

This plant is then crossed with a fertile parental line containing the barstar gene that blocks the action of the barnase gene.

The resultant F1 progeny is both high-yielding and also capable of producing seed/ grain.

Source: GEAC gives its nod for commercial cultivation of GM mustard yet again