Unit 2 Vocabulary Quiz Worksheet

subcellular, jelly-like substance in all cells in which subcellular components are suspended
cell in which most of the DNA is in an organelle called a nucleus, which is boonded by a double-membrane
DNA is concentrated in a region that is not membrane-enclosed
region that is not enclosed by a membrane; holds DNA of prokaryotes
selective barrier that allows passage of enough oxygen, nutrients, and wastes to service the entire cell
double membrane that encloses the nucleus, separating its contents from the cytoplasm
structures that carry the genetic information
the complex of DNA and proteins making up chromosomes
mass of densely stained granules and fibers adjoining part of the chromatin
carries out protein synthesis, transport of proteins into membranes or out of the cell, metabolism and movement of lipids, and detoxification of poisons; membrane-bound organelles are part of the system
proteins with carbohydrates covalently bonded to them
vesicles in transit from one part of the cell to another
The theory that states that an early ancestor of eukaryotic cells engulfed an oxygen-using non photosynthetic prokaryotic cell. Over the course of evolution, the host cell and endosymbiont cell merged into a single organism - a eukaryotic cell with a mitochondrion
interacts with the cytoskeleton for cell motility
region near the nucleus from which microtubules grow out of
a pair of tubes that are in the centrosome; each has 9 sets of triplet microtubules arranged in a ring
microtubule-containing extensions that project from some cells (single tail)
microtubule-containing extensions that project from some cells (multiple tails)
channels that connect cells in a plant cell
establish a barrier that prevents leakage of extracellular fluid across a layer of epithelial cells
fasten cells together into strong sheets; attach muscle cells to each other in a muscle
proteins surrounding a pore that provide cytoplasmic channels from one cell to an adjacent cell; are necessary for communication between cells in many types of tissues; like plasmodesmata in plant cells
allowing of some substances to cross the plasma membrane more easily than others
a molecule with both hydrophilic and hydrophobic regions; Ex: phospholipids
the currently accepted model of the arrangement of molecules in the plasma membrane, which envisions the membrane as a mosaic of protein molecules drifting in a fluid bilayer of phospholipids
penetrate the hydrophobic interior of the lipid bilayer