Question

The ______ gene from Bacillus thuringiensis produces a protein that forms crystalline inclusions in bacterial spores.

विकल्प

• cry

• myc

• ras

• nif

Answer 1

The cry gene from Bacillus thuringiensis produces a protein that forms crystalline inclusions in bacterial spores.

Explanation:

The bacteria Bacillus thuringiensis manufacture cry proteins (crystal proteins), which are encoded by cry genes. These proteins produce crystalline inclusions within bacterial spores and are harmful to some insect larvae.

When consumed, the crystal dissolves in the insect’s gut, releasing a poison that destroys the gut lining and kills the insect. This is why cry genes are utilised in pest-resistant GMO crops (such as Bt cotton).