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Which of the following is a chemical basis of heredity in the cell?

Correct Answer: B — DNA

The genetic substance of all living creatures, from viruses to man is a complex chemical compound - the nucleic acid DNA. Chromosomes are made from DNA. Genes are short sections of DNA. DNA carries the genetic code that determines the characteristics of a living thing. A gene is a short section of DNA. Each gene codes for a specific protein by specifying the order in which amino acids must be joined together. The cell's nucleus contains chromosomes made from long DNA molecules.