Biotechnology- Principles and Processes Question 45
45. Two bacteria found to be very useful in genetic engineering experiments are
(a) Escherichia and Agrobacterium
(b) Nitrobacter and Azotobacter
(c) Rhizobium and Diplococcus
(d) Nitrosomonas and Klebsiella
Show Answer
Answer : a
Hints & Solutions
(a) Escherichia and Agrobacterium are both used as vectors in genetic engineering. Nitrobacter converts nitrites to nitrates. It is a free living nitrogen fixing bacteria. Nitrosomonas converts ammonia to nitrite. Rhizobium is a symbiotic nitrogen fixing bacteria living in the root nodules of leguminous plants. Diplococcus pneumoniae causes pneumonia.
