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Bio 110 - Chapter 4
General Features of Cells
109
Biology
Undergraduate 1
06/16/2009

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Term
light and electron microscope
Definition
two kinds of microscopes
Term
magnification, resolution and contrast
Definition
three qualities in microscopes
Term

1. all living things are composed of 1 or more cells

 

2. cells are smallest unit of living organisms

 

3. new cells come from existing cells through cell division

Definition
Cell Theory
Term
Transmission Electron Microscopy
Definition
Microscopy in which a beam of electrons is transmitted through a chemically treated sample that has been hardened into a resin block and sliced into very thin sections. Stained with a heavy metal and adhered to a copper grid. The electrons that pass through form an image.
Term
Transmission Electron Microscope
Definition
Has the best resolution of any microscope.
Term
Scanning Electron Microscopy
Definition
Provides a 3-D image by using an electron beam to expose a sample coated with a thin layer of gold or palladium. The electrons that are scattered from the surface of the sample are detected and create the image.
Term
1. Matter
2. Energy
3. Organization
4. Information
Definition
Cell structure relies on what 4 things?
Term
Prokaryotes
Definition
Simple structures that lack a nucleus.
Term
Bacteria and Archaea
Definition
Categories of Prokaryotes
Term
Archaea
Definition
Less common prokaryote that is usually found in extreme environments.
Term
Bacteria
Definition
Most abundant prokaryote. Most are not harmful.
Term
Eukaryotes
Definition
All other cells with a nucleus besides prokaryotes.
Term
1. Protists
2. Fungi
3. Plants
4. Animals
Definition
Kinds of Eukaryotes
Term
Prokaryote
Definition
Bacteria: Prokaryote or Eukaryote
Term
Prokaryote
Definition
Archaea: Prokaryote or Eukaryote
Term
Eukaryote
Definition
Fungi: Prokaryote or Eukaryote
Term
Eukaryote
Definition
Plants: Prokaryote or Eukaryote
Term
Eukaryote
Definition
Protists: Prokaryote or Eukaryote
Term
Eukaryotes
Definition
Animals: Prokaryotes or Eukaryotes
Term
Paramecia and algae
Definition
Types of Protists
Term
Yeasts and Molds
Definition
Types of Fungi
Term
Organelle
Definition
Subcellular structure/compartment.
Term
Cytosol
Definition
Outside organelles but inside PM.
Term
Cytosol
Definition
Makes up 50% of cell volume
Term
Catabolism
Definition
Breakdown of molecules into smaller components.
Term
Anabolism
Definition
Synthesis (building up) of cellular molecules and macromolecules.
Term
Translation
Definition
Process of polypeptide synthesis where gene information is translated/encoded into amino acid sequences.
Term
Cytoskeleton
Definition
Provides cell organization, shape and movement.
Term
Cytoskeleton
Definition
Network of 3 protein filaments.
Term
Microtubules
Definition
Long hollow cylinders with dynamic instability (growing/shortening phases). Composed of tubulin.
Term
Microtubules
Definition
The assembly of tubulin dimers creates a polarity in ________.
Term
Positive End
Definition
Where growth of a microtubule takes place.
Term
Positive and Negative Ends
Definition
Where shortening of a microtubule takes place.
Term
Intermediate Filaments
Definition
Ropelike structure that function as tension bearing fibers that provide cell structure and stability.
Term
Intermediate Filament
Definition
More stable than microtubules and actin filaments.
Term
Actin Filaments
Definition
Microfilaments -long thin fibers composed of 2 strands of actin monomers spiraled around each other.
Term
Actin Filaments/Mirofilaments
Definition
Thinnest of all Protein filaments.
Term
Actin Filaments/Microfilaments
Definition
Anchored in plasma membrane.
Term
Intermediate filaments
Definition
Protein filament found inside the nucleus.
Term
Microtubules
Definition
Found in the centrosome/microtubule organizing center.
Term
Motor proteins
Definition
Use ATP to provide cell movement.
Term
ATP is hydrolized to cause hinge of motor protein to bend.
Definition
What causes motor proteins to move.
Term
1. Head
2. Hinge
3. Tail
Definition
Domains of a motor protein.
Term
Head
Definition
Domain of motor protein where ATP binds and is hydrolized.
Term
Hinge
Definition
Part of motor protein that bends.
Term
Tail
Definition
Part of motor protein that attaches to other proteins and cellular molecules.
Term
Motor proteins and cytoskeletal filaments.
Definition
Interact in Cilia and Flagella to produce movement.
Term
Axoneme
Definition
Structure of microtubules, core of cilium/flagellum, the motor protein dynein, and linking proteins.
Term
9 + 2 Arrangement
Definition

2 single central microtubules

 

9 doubled outer microtubules

Term
Base, Tip
Definition
In flagella/cilia, dyneins cause a bend at the _____ first then activate the microtubules in the direction of the ____ .
Term
Nucleus
Definition
Organelle containing genes.
Term
Nuclear envelope
Definition
Double membrane structure that encloses the nucleus.
Term
Nuclear pores
Definition
Form where the inner and outer nuclear membrane make contact with each other.
Term
Nuclear pores
Definition
Provide a passageway for molecules going in and out of the nucleus.
Term
Chromatin
Definition
Compacted chromosomes.
Term
Nuclear matrix
Definition
Chromosomes and filamentous network of proteins that fills the nucleus with lamins, which help organize the chromosomes.
Term
Nucleolus
Definition
Where ribosome assembly occurs.
Term
Nucleus
Definition
Primary function is to protect, organize and express genes.
Term
Endoplasmic Reticulum (ER)
Definition
Complicated network of fluid-filled flattened tubes or cisternae.
Term
Rough ER
Definition
Studded with ribosomes and involved in protein synthesis, sorting and glycosylation.
Term
Glycosylation
Definition
Attachment of carbohydrates to proteins and lipids.
Term
Smooth ER
Definition
Responsible for detoxification, carb metabolism, calcium balance, lipid synthesis and modification. Lacks ribosomes.
Term
Endoplasmic Reticulum (ER)
Definition
Cisternae =
Term
Golgi Apparatus
Definition
Not continuous with the ER
Term
Golgi
Definition
In Eukaryotes, stack of flattened membrane-bound compartments.
Term
Golgi
Definition
Where vesicles originate.
Term
Secretion, processing, and protein sorting.
Definition
Overlapping functions of the Golgi
Term
Vesicles
Definition
Transport materials between the stacks of the Golgi.
Term
Lysosomes
Definition
Organelles that contain acid hydrolases that perform hydrolysis.
Term
Lysosomes
Definition
Digest intracellular materials that are worn out through autophagosis.
Term
Vacuoles
Definition
Specialized compartments for storage, cell-volume regulation and degradation.
Term
Central Vacuole
Definition
Provide storage and support in plants.
Term
Vacuole
Definition
Organelle prominent in fungi, protists and plant cells.
Term
Phagocytic Vacuoles
Definition
In protists and white blood cells for degradation.
Term
Contracting vacuoles
Definition
In protists for expelling excess water.
Term
Plasma Membrane
Definition
Provides a boundary between the cell and the extracellular environment.
Term
Plasma Membrane
Definition
Involved in membrane transport, cell signaling and cell adhesion.
Term
Semiautonomous Organelles
Definition
Organelles that grow and divide to reproduce themselves, but depend on other parts of the cell.
Term
Mitochondria, Chloroplasts and Peroxisomes
Definition
Types of semiautonomous organelles.
Term
Mitochondria
Definition
Powerhouse of the cell.
Term
Make ATP
Definition
Primary role of mitochondria.
Term
Mitochondria
Definition
Can generate heat in brown fat cells.
Term
100's or 1000's
Definition
How many mitochondria does a cell contain?
Term
Cristae
Definition
Inner membrane of the mitochnodria fold in to form ______.
Term
Chloroplasts
Definition
Convert light into food.
Term
Thylakoid membrane
Definition
Forms many flattened, fluid filled tubes that enclose a single compartment in chloroplast.
Term
Granum
Definition
Stack of thylakoid membranes
Term
Stroma
Definition
Outside the thylakoid, but inside the inner membrane.
Term
Plastids
Definition
Determine plant color.
Term
Chloroplasts
Definition
Give plants green color.
Term
Chromoplasts
Definition
Give plants red, yellow and orange color.
Term
Leucoplasts
Definition
Plastids that lack pigment
Term
Amyloplasts
Definition
Leucoplasts that synthesize and store starches.
Term
Peroxisomes
Definition
Organelle that catalzye certain chemical reactions, typically those that break down molecules by removing hydrogen or adding oxygen.
Term
Peroxisome
Definition
Contain an enzyme called catalase.
Term
Catalase
Definition
Enzyme that breaks down H2O2 without forming dangerous free radicals.
Term
Cytoplasm
Definition
Includes everything inside the plasma membrane.
Term
Nucleus, nuclear envelope, endoplasmic reticulum, Golgi, lysosomes, vacuoles and plasma membrane
Definition
Parts of the Endomembrane System
Term
Endomembrane System
Definition
Materials within the Nucleus are not part of the _____________.
Term
Endoplasmic Reticulum membrane
Definition
Outer membrane of the nuclear envelope is continuous with the _____________.
Term
Peroxisome
Definition
Semiautonomous Organelle that lacks a genomic component.
Term
Contrast
Definition
The ability to visualize a cellular structure based on how different it looks than adjacent structures.
Term
Magnification
Definition
The ratio between the size of an image produced by a microscope and its actual size.
Term
Resolution
Definition
The ability to observe two adjacent objects as distinct from one another.
Term
DNA
Definition
Does not directly participate in translation.
Term
Basal Bodies
Definition
Cilia and Flagella emanate from these structures.
Term
Linking proteins
Definition
Structural and motor proteins are not free to move relative to each other because of _______.
Term
Dynein
Definition
The motor protein that moves along the structural proteins in cilia and flagella.
Term
ATP, Actin, and Myosin
Definition
Required to contract a skeletal muscle.
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