Examlex
The largest volcanic structures on Venus are called:
Pyrimidines
Nitrogenous bases, each composed of a single ring of carbon and nitrogen atoms (e.g., thymine, cytosine, and uracil); components of nucleic acids. Compare with purines.
Phosphate Groups
Phosphate groups are chemical groups consisting of a phosphorus atom bonded to four oxygen atoms (PO4), important in energy transfer within cells.
Ribose Groups
Components of RNA molecules consisting of five-carbon sugars connected to the nucleobases and phosphate groups.
Polysaccharide
A complex carbohydrate composed of a long chain of monosaccharide units bonded together, serving various functions including energy storage and structural roles.
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