#Question id: 10363
#Unit 6. System Physiology – Plant
Free living nitrogen fixing takes place as shown in the following;
TYPE
N-FIXING GENERA
A)
Cyanobacteria (blue-green algae) i)
Bacillus
B)
Aerobic
ii)
Clostridium
C)
Facultative
iii) Anabaena
D)
Anaerobic nonphotosynthetic iv)
Rhodospirillum
E)
Anaerobic photosynthetic
v) Azospirillum
#Question id: 10361
#Unit 6. System Physiology – Plant
The carbon skeleton for amino acids derives from 3-phosphoglycerate generated during glycolysis is called anaplueratic reaction. Generated amino acids from 3-PGA is that,
#Question id: 10360
#Unit 6. System Physiology – Plant
How much ATP require in the nitrogen fixation or conversion of ammonium assimilation in the system?
#Question id: 10357
#Unit 6. System Physiology – Plant
Why the glutamine and glutamate will not be transported while asparagine will prefer to be transported?
#Question id: 10356
#Unit 6. System Physiology – Plant
Why the GS and GOGAT is activated in light and while the AS is inhibited?
#Question id: 10354
#Unit 6. System Physiology – Plant
One of the enzyme that are involve in the ammonium assimilation is Asparagine synthetase (AS), some statements given below about AS such as,
a) This enzyme that catalyzes this reaction, is found in the cytosol of leaves and roots and in nitrogen-fixing nodules
b) High levels of light and carbohydrate inhibit the expression of genes coding for AS and the activity of the enzyme
c) Conditions of ample energy stimulate AS, thus they favor nitrogen assimilation into glutamine and glutamate
d) Energy-limited conditions inhibit GS and GOGAT, stimulate AS, and thus favor nitrogen assimilation into asparagine, a compound that is rich in nitrogen and sufficiently stable for long-distance transport or long term storage
Which of the following statements about AS is correct?