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  1. Plasmid - Definition, Types and Functions | Biology Dictionary

    Apr 7, 2019 · Plasmids have many different functions. They may contain genes that enhance the survival of an organism, either by killing other organisms or by defending the host cell by producing …

  2. Plasmid - Wikipedia

    Artificial plasmids are widely used as vectors in molecular cloning, serving to drive the replication of recombinant DNA sequences within host organisms. In the laboratory, plasmids may be introduced …

  3. Plasmid - National Human Genome Research Institute

    2 days ago · Plasmids are physically separate from chromosomal DNA and replicate independently. They typically have a small number of genes — notably, some associated with antibiotic resistance …

  4. What Is a Plasmid in Biology and How Does It Work?

    Oct 4, 2025 · Each plasmid includes an origin of replication, which controls its host range and copy number within a cell. While not essential for basic cell survival, plasmids often provide advantageous …

  5. What Do Plasmids Do and What Are Their Functions?

    Jul 29, 2025 · Plasmids are widely used in research to study gene function and regulation. By inserting a gene into a plasmid and introducing it into a cell, researchers can observe the effects of that gene’s …

  6. Plasmid: Definition, Types, Function And Significance

    Jun 2, 2024 · Plasmids are small, circular pieces of DNA that are found in both prokaryotic and eukaryotic cells. These pieces of DNA are important because they can confer special abilities to the …

  7. Plasmids: Properties, Types, and Functions - Microbe Online

    Plasmids are extra-chromosomal genetic elements that replicate independently. They are small, circular (some are linear), double-stranded DNA molecules (mostly) that exist in bacterial cells and some …

  8. PLASMIDS - Microbiology Class

    Feb 17, 2025 · Plasmids are circular piece of autonomously replicating DNA that may express antibiotic resistance gene and can also be engineered to express a particular protein of interest.

  9. What Is a Plasmid in Biology? Its Function and Uses

    Aug 23, 2025 · Plasmids are instrumental in the large-scale production of proteins, such as human insulin or growth hormones, by engineering bacteria to synthesize these valuable compounds.

  10. Plasmid | DNA replication, genetic engineering, cloning | Britannica

    Plasmids are circular deoxyribonucleic acid (DNA) molecules that replicate independently of the bacterial chromosome. They are not essential for the bacterium but may confer a selective advantage.