No, they use amino acids from food. Only some special plants (in combination with bacteria) can do this job using elemental N2
Nitrogen-fixing bacteria convert atmospheric nitrogen into ammonia, which plants can absorb and use to make proteins, amino acids, and DNA. This process is essential for nitrogen to be accessible to living organisms in a usable form.
nitrogen-fixing bacteria
Nitrogen is the most abundant element in the Earth's atmosphere. Bacteria in the soil 'fix' the nitrogen gas into compounds which can be taken in by plants; the plants get eaten by animals & they use the nitrogen to make proteins.
Proteins and nucleic acids contain nitrogen.Proteins use nitrogen as part of amino group, which is NH2.Nucleic acids use nitrogen for nitrogen bases such as adenine, guanine, cytosine, and thymine.
Plants use nitrogen primarily for producing proteins, which are essential for growth and development. Nitrogen is a major component of chlorophyll, the pigment that allows plants to carry out photosynthesis and produce carbohydrates. While nitrogen is important for overall plant health, it is not directly used in the synthesis of carbohydrates.
To make proteins
Nitrogen
All living things use nitrogen to build proteins and nucleic acids, which are essential for growth and reproduction. Nitrogen is a key component of amino acids, the building blocks of proteins, and nitrogen-containing bases in DNA and RNA.
By eating proteins as proteins have nitrogen in it
Nitrogen is consumed by different organisms in different ways. Legumes (a type of plant) are able to take nitrogen straight out of the atmosphere (which is roughly 78% nitrogen gas). Animals aren't able to do this so they must obtain their nitrogen by eating substances such as vegetables and meat. We break down proteins (largely from meat) down to their constituents which are amino acids. This is how we obtain our source of nitrogen (amino acids contain nitrogen atoms). We then use these amino acids to build proteins that we need in our body such as tissue, enzymes, antibodies and more.
Higher organisms use nitrogen to make proteins, nucleic acids (DNA and RNA), and other essential molecules necessary for growth and function. Nitrogen is a crucial component of amino acids, which are the building blocks of proteins, and is required for various biological processes within the body.
Plants are able to use simple nitrogen compounds from the soil, such as ammonium and nitrate, to synthesize proteins and other complex compounds through a process called nitrogen assimilation. This involves incorporating the nitrogen into amino acids, which are the building blocks of proteins, through a series of biochemical reactions in the plant cells.
Many compounds in plants include Nitrogen including Proteins and DNA. Note, most plants can not use atmospheric Nitrogen (N2), and must absorb nitrogen that is bonded to hydrogen or carbon such as Ammonia (NH3).
Nitrogen-fixing bacteria convert atmospheric nitrogen into ammonia, which plants can absorb and use to make proteins, amino acids, and DNA. This process is essential for nitrogen to be accessible to living organisms in a usable form.
Nitrogen is used in the males reproductive organs, the sperm to be presise.
nitrogen-fixing bacteria
Plants can not absorb atmospheric elemental Nitrogen (N2). The nitrogen must be bound to carbon or hydrogen atoms such as ammonia (NH3), or Urea (NH2)2CO. Nitrogen Fixing Plants such as clover have a symbiotic relationship with bacteria on their root system that convert atmospheric nitrogen (N2) to forms that the plants can use.