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Chp 6
Misc information for chp 6
15
Biology
Undergraduate 1
02/20/2014

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Term
Eukaryotic Cell
Definition
Size: 10-100 micrometer in diameter
Domain: Eukarotes
Kingdom: Plants, Fungi, Animals, Protists.
Basic features: Plasma membrane, Semifluid substance called cytosol,
Chromosomes (carry genes), Ribosomes (make proteins).
Term
Prokaryotic Cell
Definition
Size: 0.2-2.0 micrometer in diameter
Domain: Bacteria, Archaea
Basic features: Plasma membrane, Semifluid substance called cytosol,
Chromosomes (carry genes), Ribosomes (make proteins).
Term
Plasmodesmata
Definition
An open channel through the cell wall that connects the cytoplasm of adjacent plant cells, allowing water, small salutes, and some larger molecules to pass between the cells.
Term
The Cytoskelton
Definition
*a network of fibers extending throughout the cytoplasm.
*it organizes the cells structures and activities, anchoring many organelles.
*Composed of three types of molecular structures: Microtubules, Microfilaments, Intermediate filaments.
Term
The Nuclear envelope
Definition
In a eukaryotic cell, the double membrane that surround the nucleus, perforated with pores that regulate traffic with the cytoplasm. The outer membrane is continuous with the endoplasmic reticulum.
Term
Chloroplasts: Capture of Light Energy
Definition
*A member of a family of organelles called plastids
*Contain the green pigment chlorophyll, as well as enzymes and other molecules that function in photosynthesis.
*found in leaves and other green organs of plants and in algae.
Term
Chloroplasts Functions Includes:
Definition
*Thylakoids, membranous sacs, stacked to form a granum
*Stroma, the internal fluid.
Term
Ribosomes
Definition
Structure: Two subunits made of ribosomal RNA and proteins; can be free in cytosol or bound to ER.
Function: Protein synthsis
***build proteins in 2 locales 1. In the cytosol (free ribosomes) 2. on the outside of the endoplasmic reticulum or the nuclear envelope (bound ribosomes)
Term
Nuclear Envelope
Definition
In a eukaryotic cell, the double membrane that surround the nucleus, perforated with pores that regulate traffic with the cytoplasm. The outer membrane is continuous with the endoplasmic reticulum. The pore complex lines each pore and plays an important role in the cell by regulating the entry and exit of proteins and RNAs, as well as large complexes of macromolecules.
Term
Smooth ER
Definition
Synthesis of lipids, metabolism of carbohydrates, and detoxification of drugs and poisons, stores calcium ions.
Term
Rough ER
Definition
Aids in synthesis of secretory and other proteins from bound ribosomes; adds carbohydrates to proteins to make glycoproteins; produces new membrane.
Term
Endoplasmic reticulum
Definition
Extensive network of membrane bounded tubules and sacs; membrane separates lumen from cytosol; continuous with nuclear envelope.
Term
Golgi Apparatus
Definition
Structure:Stacks of flattened membranous sacs; has polarity (cis and trans faces)
Function: Modification of proteins, carbohydrates on proteins, and phospholipids; synthesis of many polysaccharides; sorting of Golgi products, which are then released in vesicles.
Term
Lysosomes
Definition
Structure: Membranous sac of hydrolytic enzymes (in animal cells) Function: Breakdown of ingested substances, cell macromolecules, and damaged organelles for recycling.
Term
Vacuoles
Definition
Structure: Large membrane-bounded vesicle Function:Digestion, storage, waste disposal, water balance, cell growth, and protection.
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