مندرجہ ذیل میں سے کون سا نائٹروجن فکسنگ انزائم ہے؟
A. Nitrate reductase
B. Arginase
C. Urease
D. None of these
Explanation
Nitrate reductase is an enzyme involved in the nitrogen cycle that reduces nitrate (NO₃⁻) to nitrite (NO₂⁻), a crucial step in nitrogen assimilation in plants.
It plays a key role in converting inorganic nitrogen into forms usable by plants for amino acid and protein synthesis.
Nitrogen fixation refers to the process of converting atmospheric nitrogen (N2) into a usable form for plants.
This can happen through several methods:
Atmospheric fixation:
This occurs naturally when lightning strikes, breaking the strong nitrogen-nitrogen triple bond and creating nitrogen oxides that can dissolve in rainwater.
Industrial fixation:
This involves using high-temperature and pressure processes, like the Haber-Bosch process, to convert nitrogen into ammonia.
This method is crucial for industrial agriculture.
Biological fixation:
This process is carried out by certain bacteria, such as those found in the root nodules of legumes (like peas and beans), or free-living bacteria in the soil.
These bacteria can break down the nitrogen molecule and convert it into ammonia or other usable nitrogen compounds.
