Question:
Which one of the following statements is TRUE about leghemoglobin?
Which one of the following statements is TRUE about leghemoglobin?
Show Hint
Nitrogenase is oxygen-sensitive; leghemoglobin acts as an oxygen buffer.
It ensures both protection of nitrogenase and energy supply for rhizobia.
Updated On: Aug 26, 2025
- It binds oxygen to protect nitrogenase
- It binds hemoglobin to protect oxygenase
- It binds oxygen to protect hydrogenase
- It binds oxygen to protect oxygenase
Hide Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Leghemoglobin is an oxygen-binding hemoprotein found in the root nodules of leguminous plants.
Step 2: The enzyme nitrogenase, which fixes atmospheric nitrogen into ammonia, is highly oxygen-sensitive and gets inactivated in the presence of oxygen.
Step 3: Leghemoglobin binds oxygen, maintaining a low free oxygen concentration in nodules, while still supplying enough oxygen for bacterial respiration.
Step 4: This protects nitrogenase from inactivation. Therefore, the correct answer is (A).
Step 2: The enzyme nitrogenase, which fixes atmospheric nitrogen into ammonia, is highly oxygen-sensitive and gets inactivated in the presence of oxygen.
Step 3: Leghemoglobin binds oxygen, maintaining a low free oxygen concentration in nodules, while still supplying enough oxygen for bacterial respiration.
Step 4: This protects nitrogenase from inactivation. Therefore, the correct answer is (A).
Was this answer helpful?
0
0
Top Questions on Plant Physiology
- Which of the following statements are right about “Guttation”? A. The term is given by Stephan Hales
B. It is caused due to root pressure
C. Normally it occurs in the day
D. Exudation of water with salt and minerals through hydathode
- CUET (PG) - 2025
- Agricultural Science
- Plant Physiology
- Long day plants require-
- CUET (PG) - 2025
- Agricultural Science
- Plant Physiology
- Father of Plant Physiology is-
- CUET (PG) - 2025
- Agricultural Science
- Plant Physiology
- Which essential nutrient is involved in regulating the opening and closing of the stomata of plants?
- CUET (PG) - 2025
- Agricultural Science
- Plant Physiology
- All fruit, vegetable as well as flowers have to go through a certain stage of growth and maturity in their life cycle before they can reproduce sexually. This stage is known as
- CUET (PG) - 2025
- Horticulture
- Plant Physiology
View More Questions
Questions Asked in GATE BT exam
- Let \( A = \begin{pmatrix} 1 & 0 & 1 \\ 0 & k & 0 \\ 3 & 0 & -1 \end{pmatrix} \). If the eigenvalues of \( A \) are -2, 1, and 2, then the value of \( k \) is __________. (Answer in integer)
- GATE BT - 2025
- Eigenvalues
- For the coupled reactions given below: Glucose 6-phosphate + H\(_2\)O → Glucose + Pi (Reaction 1)
ATP + Glucose → ADP + Glucose 6-phosphate (Reaction 2) The standard free energy change of ATP hydrolysis at 25 °C is __ kJ/mol. The equilibrium constants for Reaction 1 and Reaction 2 are 360 and 800, respectively; Gas constant \( R = 8.314 \, {J mol}^{-1} {K}^{-1} \). (Round off to two decimal places)- GATE BT - 2025
- Biochemical Techniques
- An NMR spectrometer operating at proton resonance frequency \( \nu \) of 1 GHz will have a magnetic field strength of __________ Tesla (T). The gyromagnetic ratio for proton, \( \gamma = 2.675 \times 10^8 \, {T}^{-1} {s}^{-1} \). (Round off to one decimal place)
- GATE BT - 2025
- NMR and ESR spectroscopy
- Let \( a_0 = 0 \) and define \( a_n = \frac{1}{2} (1 + a_{n-1}) \) for all positive integers \( n \geq 1 \). The least value of \( n \) for which \( |1 - a_n|<\frac{1}{2^{10}} \) is ______.
- GATE BT - 2025
- Recurrence Relations
- Two fair six-sided dice, with sides numbered 1 to 6, are thrown once. The probability of getting 7 as the sum of the numbers on the top side of the dice is ________. (Round off to two decimal places)
- GATE BT - 2025
- Statistics and Probability
View More Questions