What is the cofactor for nitrate reductase?
Nitrate reductase requires molybdenum (Mo) as cofactor.
Which element is required for the activity of nitrate reductase?
So, the correct answer is ‘Molybdenum’
How is nitrate reductase regulated?
In higher plants, nitrate reduction is highly regulated. A range of environmental factors influence the expression of the corresponding genes as well as the enzyme activity levels. NR activity expression and activity is controlled by light, temperature, pH, CO2, O2, water potential and N source.
What is the activator of nitrate reductase?
Magnesium is an activator of enzyme nitrite reductase.
What is the meaning of nitrate reductase?
Nitrate reductase (NR) catalyses the conversion of nitrate to nitrite, usually a rate-limiting step of nitrogen assimilation pathway in higher plants as well as microalgae.
Where is nitrate reductase found?
In eukaryotic algae and photosynthetic tissues of higher plants, nitrate reductase appears to be located either in the cytoplasm or loosely bound to the outer envelope of chloroplasts.
What are the functional difference between nitrate reductase and nitrite reductase?
Nitrate reductase is a membrane-bound enzyme involved in energy conservation, whereas nitrite reductase is a cytosolic enzyme involved in NADH reoxidation. The absence of oxygen and the presence of nitrate and/or nitrite induce nitrate reductase and nitrite reductase activities.
What does nitrogen reductase do?
Nitrate reductase (NR) is the key enzyme for nitrogen assimilation in plant cells and also works as an important enzymatic source of nitric oxide (NO), which then regulates plant growth and resistance to biotic and abiotic stresses.
Where is nitrate reductase present?
Eukaryotic nitrate reductases are members of the sulfite oxidase family that reduce nitrate to nitrite as the first step in the assimilation of nitrogen. They are found in plants and fungi, use NADH or NADPH as reducing equivalents, and harbor a heme and a FAD cofactor in addition to the molybdenum active site.