Biological Classification And System Of Classification Question 96
Question: The symbiotic nitrogen fixing bacteria present in root nodules of legumes belongs to genus
[DPMT 1982; MP PMT 1989; DPMT 1993; CPMT 1998; CBSE PMT 1999; Pb. PMT 1999; BVP 2002; Kerala CET 2003; MHCET 2004]
Options:
A) Xanthomonas
B) Pseudomonas
C) Rhizobium
D) Acetobacter
Show Answer
Answer:
Correct Answer: B
Solution:
Rhizobia are the nitrogen-fixing bacteria that form a symbiotic association with roots of leguminous plants.
They bring about nodule formation in the root and multiply inside the nodule.
They fix atmospheric nitrogen ($N_2$) into organic form ($NH_3$) by an enzyme called nitrogenase.
The plant supplies all the necessary nutrients and energy for the bacteria. A symbiotic relationship in which both partners benefits is called mutualism.
BETA
