BIOLOGY DICTIONARY

The primary energy currency molecule used by cells to perform biological work.

A cellular structure composed of RNA and protein that serves as the site of protein synthesis.

An organism whose cells contain a distinct, membrane-bound nucleus and other specialized organelles.

A single-celled organism that lacks a membrane-bound nucleus and membrane-bound organelles.

The double-helix molecule that contains the genetic instructions for the development and functioning of all living organisms.

A single-stranded nucleic acid molecule involved in coding, decoding, regulation, and expression of genes.

A thread-like structure of nucleic acids and protein found in the nucleus, carrying genetic information in the form of genes.

A process of cell division that results in two genetically identical daughter cells.

The state of steady internal, physical, and chemical conditions maintained by living systems.

The organ system consisting of the heart and blood vessels that circulates blood throughout the body.

The system of organs responsible for gas exchange, primarily O2 intake and CO2 release.

Any microorganism or biological agent that causes disease in its host.

A submicroscopic infectious agent that replicates only inside the living cells of an organism.

The collective community of microorganisms that reside in a specific environment, such as the human gut.

The position that an organism occupies in a food chain or ecological pyramid.

The process by which plants and other autotrophs convert light energy into glucose.

The study of the relationships between living organisms and their physical environment.