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Listen to pronunciation. (sel) In biology, the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body. A cell has three main parts: the cell membrane, the nucleus, and the cytoplasm.
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or do you mean phone number?
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At the “center” of each amino acid is a carbon called the α carbon and attached to it are four groups - a hydrogen, an α- carboxyl group, an α-amine group, and an R-group, sometimes referred to as a side chain.
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Answer:
its a alteration i would go with B
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DNA.
DNA has a phosphate and deoxyribose sugar backbone.
