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biology word puzzle

Across
The base that exists in RNA but not DNA
The most branched glucose chain
The combination of phosphate and ribose/deoxyribose in nucleotides
The functional group with OH
The condition in which the internal environment of an organism maintains stable
The reactants in an enzyme-catalyzed reaction
The monomer of nucleic acids
The bond between a C and a N that only exists in amino acids
The lipid with a single bond between 2 Cs
The functional group found in nucleic acids and phospholipids
All chemical reactions within an organism
The bond that holds DNA strands together
The only group that varies in different amino acids
The functional group with COOH
The base that bonds with cytosines
Down
The base that bonds with thymines
The linear glucose chain
The attraction between molecules of the same substance
The attraction between molecules of different substances
The bond between a metal and a non-metal substance
The reaction with water and a polymer being its reactants
The reaction that produces water and a polymer
The adjective used to describe substances that are easy to dissolve
A kind of protein that changes the speed of chemical reactions but is not a reactant itself
The functional group found in amino acids