Biology Dictionary

  • Polymerase

    Polymerase

    An enzyme that synthesizes polymers of nucleic acids, such as DNA or RNA, by adding nucleotides to a growing chain.

  • Polymerase chain reaction (PCR)

    Polymerase chain reaction (PCR)

    A laboratory technique used to amplify a segment of DNA, making millions of copies of a specific DNA sequence.

  • Polymeric

    Polymeric

    Relating to or composed of polymers.

  • Polymorphic

    Polymorphic

    Referring to the occurrence of two or more forms or types in a population, species, or organism, such as genetic…

  • Polyphagia

    Polyphagia

    Excessive hunger or overeating, often associated with medical conditions such as diabetes mellitus.

  • Polyploidization

    Polyploidization

    The process by which an organism or cell gains one or more additional sets of chromosomes, leading to polyploidy.

  • Polyploidy

    Polyploidy

    The condition in which an organism has more than two complete sets of chromosomes, often leading to larger cells and…

  • Polysaccharides (also polysaccharoses)

    Polysaccharides (also polysaccharoses)

    Carbohydrates made up of multiple sugar molecules linked together, such as starch, cellulose, and glycogen.

  • Polytene chromosome

    Polytene chromosome

    A type of chromosome found in some organisms, notably in the salivary glands of certain insects, where it is formed…

  • Polytypic

    Polytypic

    Referring to a species or group that contains multiple different forms or types, often used to describe species with several…