The primary product of the nitrogenase-catalyzed reaction in the root nodules of leguminous plants is:
Ammonia
Nitrates
Nitrites
Dinitrogen
Related Questions
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
Which element is converted into a usable form for plants within root nodules?
Phosphorus
Potassium
Nitrogen
Sulfur
Which statement is TRUE regarding the protection of nitrogenase from oxygen?
Nitrogenase is insensitive to oxygen.
Oxygen promotes nitrogenase activity.
Leghaemoglobin binds with oxygen in root nodules.
Nitrogen fixation occurs best in aerobic conditions.
The relationship between Rhizobium bacteria and leguminous plants is an example of:
Parasitism
Commensalism
Symbiosis
Predation
Leg haemoglobin acts as?
Oxygen scavenger
scavenger
Oxygen delivery agent
none of the above
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
Which enzyme complex is responsible for the conversion of atmospheric nitrogen to ammonia within the root nodules?
Nitrogenase
Nitrate reductase
Nitrite reductase
Glutamine synthetase
The primary product of the nitrogenase-catalyzed reaction in the root nodules of leguminous plants is:
Ammonia
Nitrates
Nitrites
Dinitrogen
Which of the following is NOT a direct consequence of Nod factor signaling in the host plant during root nodule formation?
Root hair curling
Formation of infection threads
Cortical cell division leading to nodule primordia formation
Expression of nif genes in bacteroids
The enzyme nitrogenase is highly sensitive to oxygen. How do root nodules maintain a low oxygen environment necessary for nitrogen fixation?
Active transport of oxygen out of the nodule
Anaerobic respiration within the bacteroids
Leghemoglobin binds oxygen, buffering its concentration
Thick cell walls of the nodule prevent oxygen diffusion
