The symbiotic relationship between legumes and rhizobia is an example of:
Mutualism
Parasitism
Commensalism
Amensalism
Related Questions
Which of the following bacteria is commonly involved in root nodule formation in leguminous plants?
Azotobacter
Nitrosomonas
Rhizobium
Clostridium
For nitrogen fixation, useful pigment is
Nitrogenase
Haemoglobin
Myoglobin
Leghaemglobin
Select the correct statement.
Legumes are incapable of fixing nitrogen
Legumes fix nitrogen through bacteria living in fruits
Legumes fix nitrogen only by bacteria present in root nodules
None of the above
Which of the following is the initial nitrogenous compound produced during nitrogen fixation in the root nodules of legumes?
Nitrate
Ammonia
Nitrite
Dinitrogen
What is the primary benefit for leguminous plants in forming root nodules with nitrogen-fixing bacteria?
Increased water absorption
Protection from pathogens
Access to usable nitrogen
Enhanced photosynthesis
During the process of root nodule formation, which of the following is the initial signal molecule released by the plant roots that attracts rhizobia?
Flavonoids
Nod factors
Lectins
Cytokinins
The enzyme nitrogenase, crucial for biological nitrogen fixation, is highly sensitive to oxygen. Which of the following mechanisms protects nitrogenase from oxygen inactivation in symbiotic nitrogen-fixing bacteria?
Thick cell walls
High respiration rate
Leghaemoglobin
Photosynthesis
Which two important amides found in the plants are structural part of proteins
Glutamate and ureides
Glycine and serine
Glutamine and asparagine
Asparagine and arginine
Leg haemoglobin acts as?
Oxygen scavenger
scavenger
Oxygen delivery agent
none of the above
A mutation in a legume plant prevents the formation of infection threads during rhizobial symbiosis. Which of the following processes would be MOST directly affected?
Recognition of the rhizobia by the root hairs
Curling of root hairs
Formation of the nodule meristem
Release of bacteria into the host cell cytoplasm
