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  1. Organisms composed of cells that contain nuclei are classified as eukaryotes, whereas organisms composed of cells that lack nuclei are classified as prokaryotes. In eukaryotes, DNA is housed ...

    • Who Discovered DNA?
    • What Are The Different Types of DNA?
    • What Is DNA Replication?
    • Can Genetic Diseases Be Cured?

    The discovery of DNA is credited to Swiss scientist Friedrich Miescher, who first isolatedTrusted Source DNA from human pus cellsin the late 1860s.

    There are many types of DNA, each of which varies depending on its specific structure. The most commonis B-DNA, but some other types found in the genome include A-DNA, H-DNA, and Z-DNA.

    DNA replication is a process that occursTrusted Source when DNA in the cells copies itself. This helps ensure that each new cellhas its own complete genome during cell division.

    Doctors can only treat the symptoms of conditions caused by a genetic mutation. However, researchers are continuously working to develop gene therapy types that may help stop a disease from progressing. The U.S. Food and Drug Administration (FDA) has approvedsome gene therapy drugs, while others are undergoing clinical trials.

  2. The cell is the basic structural and functional unit of all forms of life. Every cell consists of cytoplasm enclosed within a membrane; many cells contain organelles, each with a specific function. The term comes from the Latin word cellula meaning 'small room'. Most cells are only visible under a microscope.

  3. Molecular genetics emerged from the realization that DNA and RNA constitute the genetic material of all living organisms. (1) DNA, located in the cell nucleus, is made up of nucleotides that contain the bases adenine (A), thymine (T), guanine (G), and cytosine (C). (2) RNA, which contains uracil (U) instead of thymine, transports the genetic ...

  4. Genes are part of cell structures called chromosomes. In multicellular organisms, chromosomes are found in the nucleus of the cell. Each of these chromosomes contains one, long molecule of DNA, or d eoxyribo n ucleic a cid. A gene is a specific stretch of this DNA molecule. Each chromosome in the cell contains many genes.

  5. en.wikipedia.org › wiki › DNADNA - Wikipedia

    DNA exists in many possible conformations that include A-DNA, B-DNA, and Z-DNA forms, although only B-DNA and Z-DNA have been directly observed in functional organisms. The conformation that DNA adopts depends on the hydration level, DNA sequence, the amount and direction of supercoiling, chemical modifications of the bases, the type and ...

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