Chapter 6 Flashcards
Which 2 domains consist of prokaryotic cells?
Bacteria, archaea
Where is the DNA located in prokaryotic and eukaryotic cells?
Nucleoid, Nucleus
Rigid structure outside of the cell membrane
Cell wall
Allows passage of enough oxygen, nutrients, and wastes to service the cell
Plasma membrane
Contains circular DNA
Bacterial chromosome
Why are cells small?
Allows substances to cross faster, has a higher surface area
Thin projections coming out of the cells
Microvilli
Framework of protein fibers extending throughout the nuclear interior
Nuclear matrix
Netlike array of protein filaments that maintains the shape of the nucleus by mechanically supporting the nuclear envelope
Nuclear lamina
What are the 2 components of chromatin?
DNA and proteins
What’s assembled in the nucleoli?
Ribosomal RNA and proteins
Carry out proteins synthesis
Ribosomes
What is the function of the smooth ER?
Metabolic processes, lipid synthesis
What is the function of the rough ER?
Protein synthesis, makes membrane phospholipids
sack of hydrolytic enzymes that animal cell uses to digest
Lysosome
What is the pH of a lysosome?
7
Engulfing smaller organisms or food particles
Phagocytosis
Recycling the cell’s own organic materials
Autophagy
Formed by phagocytosis of particles to be used as food for the cell
Food vacuoles
Pumps excess water out of the cell
Contractile vacuoles
Includes cell sap and absorbs water
Central vacuoles in plants
Cells living within other cells
Endsymbiont
What is the endosymbiont theory?
Early ancestor of eukaryotic cell engulfed an oxygen using nonphotosynthetic prokaryotic cell
What is the function of mitochondira?
Cellular respiration
What is the function of chloroplasts?
Photosynthesis
Removes hydrogen from substances and transfer them to oxygen creating H2O2
Peroxisome
Play a role in mitosis
Centriole
Made up of 2 centrioles
Centrosome
Site of photosynthesis
Chloroplast
Essential component of a cell membrane
Cholesterol
Specialized for moving fluid past te cell
Cilia
Intracellular signaling molecule (second messenger) in eukaryotic cells
cAMP
Suspends organelles in cell
Cytoplasm
Serve as mechanical, transport, and signaling functions; made up of microtubules and microfilament
Cytoskeleton
Semifluid portion of the cytoplasm
Cytosol
Intercellular junction in animal cells that functions as a rivet, fastening cells together
Desmosomes
Made up of the nuclear envelope, golgi body, ER, cell membrane, lysosomes, vesicles, vacuoles
Endomembrane system
Meshwork surrounding animal cells; made up of gylcoproteins, polysaccharides
Extracellular matrix
Proteins surrounding the a pore that allows passage of materials between cells
Gap junction
Modify, store, and route products from the ER
Golgi body
Specific chemicals that act on certain cells
Hormone
Site of cellular respiration
Mitchondria
Membrane that surrounds the nucleus
Nuclear envelope
Allows the passing of ions into the nucleus
Nuclear pore
Where DNA is concentrated in a prokaryotic cell
Nucleoid
Contains rRNA, site of ribosome synthesis
Nucleolus
Contains the genetic material of a cell
Nucleus
Holds water in a plant cell
Vacuole
Transport materials in the cell
Vesicle