Biology glossary

food molecule that stimulates gustatory receptors

clusters of taste cells

conserved promoter sequence in eukaryotes and prokaryotes that helps to establish the initiation site for transcription

directed movement in response to a stimulus

(also citric acid cycle) alternate name for the citric acid cycle, named after the group name for citric acid, tricarboxylic acid (TCA); see citric acid cycle

inner layer of the seed coat

polymer associated with the cell wall of Gram-positive bacteria

enzyme that contains a catalytic part and an inbuilt RNA template; it functions to maintain telomeres at chromosome ends

DNA at the end of linear chromosomes

strand of DNA that specifies the complementary mRNA molecule

non-orbital opening in the skull that may allow muscles to expand and lengthen

differences in breeding schedules that can act as a form of prezygotic barrier leading to reproductive isolation

part of the cerebral cortex that processes auditory input; parts of the temporal lobe are involved in speech, memory, and emotion processing

modified stem consisting of slender, twining strands used for support or climbing

region of bronchiole that attaches to the respiratory bronchioles