test plant cell terms

cytoskeleton

supports organelles cell shape and plays a role in cell motion

microtubule

tube of protein molecules present in cytoplasm, centrioles, cilia, and flagella

intermediate filament

intertwined protein fibers that provide support and strength

actin filament

twisted protein fibers that are responsible for cell movement

centriole

complex assembly of microtubules that occurs in pairs

cytoplasm

semifluid matrix that contains the nucleus and other organelles

mitochondrion

organelle in which energy is extracted from food during oxidative metabolism

secretory vesicle

vesicle fusing with the plasma membrane, releasing materials to be secreted from the cell

lysosome

vesicle that breaks down macromolecules and digests worn out cell components

golgi complex

collects, packages, and distributes molecules manufactured in the cell

plasma membrane

lipid bilayer in which proteins are embedded

peroxisome

vesicle that contains enzymes that carry out particular reactions such as detoxifying potentially harmful molecules

ribosomes

small complexes of RNA and protein that are sites of protein synthesis

nuclear pore

opening embedded with proteins that regulates passage into and out of the nucleus

nuclear envelope

double membrane between the nucleus and the cytoplasm

nucleolus

site where ribosomes are produced

nucleus

command center of the cell

smooth ER

system of internal membranes that aids in the manufacture of carbohydrates and lipids

rough ER

internal membranes studded with ribosomes that carry out protein synthesis