Biology Dictionary

  • Ascus (plural asci)

    Ascus (plural asci)

    A sac-like structure where ascospores are formed in ascomycete fungi.

  • Asexual

    Asexual

    Reproduction that does not involve the fusion of gametes or change in chromosome number.

  • Asexual reproduction

    Asexual reproduction

    A mode of reproduction involving a single parent that results in offspring genetically identical to the parent.

  • Asparagine synthase

    Asparagine synthase

    An enzyme involved in the biosynthesis of asparagine from aspartate.

  • Aspartate-ammonia ligase

    Aspartate-ammonia ligase

    An enzyme that catalyzes the conversion of aspartate and ammonia to asparagine.

  • Aspartic acid (d or asp)

    Aspartic acid (d or asp)

    A non-essential amino acid involved in the synthesis of proteins and metabolic cycles.

  • Assay

    Assay

    An investigative procedure for qualitatively assessing or quantitatively measuring the presence of a substance.

  • Assembly

    Assembly

    The process of putting together the parts of a structure, such as DNA sequences or protein complexes.

  • Assimilation

    Assimilation

    The process by which living organisms integrate nutrients into their body tissues.

  • Associative learning

    Associative learning

    A learning process in which a new response becomes associated with a particular stimulus.