DNA is made up of 4 different nitrogen bases: Adenosine (A), thymine(T), cystosine(C), guanine(G).Made up genetic code.Group of these three bases form a codon that stands for amino acid or codes. DNA stays in the nucleus, yet the actual process occurs in ribosome of the rough endoplasmic reticulum. Coding for a specific protein from DNA are transferred to the ribosomes in form of RNA, a small molecule that can leave the nucleus. The codons in RNA are complementary to the codons in DNA, so the thymine (T) in DNA is replaced with uracil (U) in RNA.
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Messenger RNA(mRNA)-copies the gentic instruction from DNA in the nucelus and carries them to ribosome in cytoplasm.
While DNA can make protein, protein can't make DNA