A. Telomeres are the protective caps at the ends of chromosomes in cells.
端粒就是细胞内的染色体上的一个保护罩。
Our DNA is carrying chromosomes and at each end of these, a sort of protective caps called telomeres.
我们的DNA携带染色体，在每条染色体的末端都有保护性的端粒。
Our DNA is carrying chromosomes and at each end of these, a sort of protective caps called telomeres.
我们的DNA携带染色体，在每条染色体的末端都有保护性的端粒。
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