Question

Which of the following is not a source of restriction endonuclease?

• A. Haemophilus influenza
• B. Escherichia coli
• C. Agrobacterium tumefaciens
• D. Bacillus amyloli

Answer 1

Answer: (C)

Agrobacterium tumefaciens

• Agrobacterium tumefaciens is a pathogen of several dicot plants. It delivers a piece of DNA known as T-DNA' in the Ti plasmid which transforms normal plant cells into tumor cells to produce chemicals against pathogens.
• The restriction enzyme Eco Rl, is isolated from Escherichia coli RY13. The first restriction enzyme Hind II was isolated from the bacterium Haemophilus influenzas.
• The restriction enzyme Bam HI is isolated from Bacillus amyloli.

So, the correct option is option C.