Question
Easy
Solving time: 3 mins
What are the conditions necessary for fixation of atmospheric nitrogen by Rhizobium. What is their role in N fixation?
Found 7 tutors discussing this question
Discuss this question LIVE
8 mins ago
Text solutionVerified
Rhizobium is a symbiotic bacteria present in the root nodules of leguminous plants. The basic requirements for Rhizobium to carry out nitrogen fixation are as follows :
(a) Presence of the enzyme nitrogenase
(b) Presence of leg-haemoglobin
(c) Non-haem iron protein, ferrodoxin as the electron-carrier
(d) Constant supply of ATP
(e) ions as co-factors
Rhizobium contains the enzyme nitrogenase - a Mo-Fe protein - that helps in the conversion of atmospheric free nitrogen into ammonia.
The reaction is as follows :
The Rhizobium bacteria live as aerobes under free-living conditions, but require anaerobic conditions during nitrogen fixation. This is because the enzyme nitrogenase is highly sensitive to molecular oxygen. The nodules contain leg-haemoglobin, which protects nitrogenase from oxygen.
(a) Presence of the enzyme nitrogenase
(b) Presence of leg-haemoglobin
(c) Non-haem iron protein, ferrodoxin as the electron-carrier
(d) Constant supply of ATP
(e) ions as co-factors
Rhizobium contains the enzyme nitrogenase - a Mo-Fe protein - that helps in the conversion of atmospheric free nitrogen into ammonia.
The reaction is as follows :
The Rhizobium bacteria live as aerobes under free-living conditions, but require anaerobic conditions during nitrogen fixation. This is because the enzyme nitrogenase is highly sensitive to molecular oxygen. The nodules contain leg-haemoglobin, which protects nitrogenase from oxygen.
Was this solution helpful?
45
Share
Report
One destination to cover all your homework and assignment needs
Learn Practice Revision Succeed
Instant 1:1 help, 24x7
60, 000+ Expert tutors
Textbook solutions
Big idea maths, McGraw-Hill Education etc
Essay review
Get expert feedback on your essay
Schedule classes
High dosage tutoring from Dedicated 3 experts
Practice more questions from Biology (NCERT)
Practice questions from Biology (NCERT)
Question 2
Easy
Views: 5,714
Question 3
Easy
Views: 6,237
Question 4
Easy
Views: 6,255
Which of the following statements are true? If false, correct them.
(a) Boron deficiency leads to the stout axis.
(b) Every mineral element that is present in a cell is needed by the cell.
(c) Nitrogen as a nutrient element, is highly immobile in plants.
(d) It is very easy to establish the essentiality of micronutrients because they are required only in trace quantities.
Practice more questions from Mineral Nutrition
Question 3
Easy
Views: 5,954
A. Manganese I. component of various enzymes and participate in nitrogen metabolism
B. Zinc II. required for pollen germination and carbohydrate translocation
C. Molybdenum III. helps in splitting of water to liberate oxygen during photosynthesis
D. Boron IV. needed in the synthesis of auxin
Practice questions on similar concepts asked by Filo students
Question 1
Views: 5,011
Question 2
Views: 5,830
Question 3
Views: 5,296
Stuck on the question or explanation?
Connect with our Biology tutors online and get step by step solution of this question.
231 students are taking LIVE classes
Question Text | What are the conditions necessary for fixation of atmospheric nitrogen by Rhizobium. What is their role in N fixation? |
Topic | Mineral Nutrition |
Subject | Biology |
Class | Class 11 |
Answer Type | Text solution:1 |
Upvotes | 45 |