What organic substances of the cell provide for the storage and transmission of hereditary information? Where are they located in the cell?

univerkov | November 16, 2020 | education

The storage and transmission of hereditary information is provided by DNA molecules and three types of RNA – transport (tRNA), informational (mRNA) and matrix (mRNA). They are composed of organic substances – nucleotides. The DNA nucleotide contains pentose (a five-carbon carbohydrate called deoxyribose), one of the nitrogenous bases (adenine, thymine, guanine, or cytosine), and a phosphoric acid residue. The structure of the RNA nucleotide is similar, only the nitrogenous base of thymine is replaced by uracil, and pentose is called ribose. DNA is found in the cell in the nucleus, mitochondria and plastids. RNA is synthesized in the cell nucleolus. tRNA is in the cytoplasm of the cell, mRNA in the nucleus, mRNA on the ribosomes.

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