That is a possibility Andromeda321, However we cannot get fixated on what life is.
There could be several types of "life" as we know it. If it meets the Criteria for life, then it is life, regardless of whether or not is is carbon based, Silcon based, Hydrogen based etc.
All life on earth has DNA. That does not mean that all life in the universe has DNA.
I firmly believe that if we find Life elsewhere, It very well may not be Carbon based and may have a completely different encoding mechanism than DNA.
I also think that we may not recognize it as life unless we consider ALL the possibilities and remain open to an infinite number of Combinations
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