Science 7 Flashcards
Cell
In biology, the smallest unit that can perform all life processes; cells are covered by a membrane and have DNA and cytoplasm.
Nucleus
in a eukaryotic cell, a membrane-bound organelle that contains the cell’s DNA and that has a role in processes such as growth, metabolism, and reproduction.
Cytoplasm
A fluid in a cell.
Cell membrane
A phospholipid layer that covers a cell’s surface; acts as a barrier between the inside of a cell and the cell’s environment.
Cell wall
A rigid structure that surrounds the cell membrane and provides support to the cell.
Mitochondrion
In eukaryotic cells, the cell organelle that is surrounded by two membranes and that is the site of cellular respiration.
Chloroplast
The organelle that uses the energy of sunlight to make food.
Golgi complex
The organelle that processes and transports proteins and other materials out of cells.
Endoplasmic reticulum
The organelle that makes lipids, breaks down drugs and other substances,and packages proteins for Golgi complex.
Ribosome
The organelle in which amino acids are hooked together to make proteins.
Lysosome
The organelle that digests food particles, wastes, cell parts, and foreign invaders.
Vacuole
The organelle that stores water and others materials.
Organelle
One of the small bodies in a cell’s cytoplasm that are specialized to perform a specific function.
Eukaryote
An organism made up of cells that have a nucleus enclosed by a membrane; eukaryote include animals, plants, and fungi, but not archaebacteria or eubacteria.
Prokaryote
An organism that consists of a single cell that does not have a nucleus.
