Cell Bio Lab Practical Flashcards
Agranulocytes
Lymphocytes and Monocytes
Granulocytes
Neutrophils, Eosinophils, Basophils
Attached to nose piece of microscope with 4 different attachments
Objective Lens
Process of enlarging an object only in appearance
Magnification
The ability to tell 2 points apart as separate points
Resolution
The vertical distance with which structure are in sharp focus
Depth of Field (DOF); decreases as magnification is increased
Distance from the bottom of the microscope (lens) to the part of the specimen that is in focus
Working Distance; decreases as magnification increases
Most commonly micrometer
Unit of Length
Under normal viewing conditions resolution is increased by decreasing the wavelength of the light source; wavelength/2 X numerical aperture
Resolving Power
Two fundamental characteristics of living organisms
Self-maintenance and Self-replication
The smallest unit of life
Single cell
Cell Theory
- All organisms are composed of cells
- All cells arise from preexisting cells
- All hereditary components of organisms occur in cells
Difference between Prokaryote and Eukaryote
Organelles in Euk.
No nucleus in Pro
Pro DNA is circular
Bacteria that use H2 to reduce CO2 to methane
Methonagens
Bacteria that live where it is hot and acidic
Thermoacidophiles
Bacteria that live where it is hot
Hyperthermophiles
Salt-loving bacteria
Extreme Halophiles
Bacteria that respire using sulfur and organic carbon and live in extreme heat and acidic environments
Thermoplasma
Bacteria that survive and multiply only in the absence of free oxygen
Obligate anaerobes
Bacteria that can survive without oxygen when it is unavailable, but it also oxygen tolerant
Facultative Anerobes
Morphological Groups
Coccus and Bacillus and Spirillum
Spherical Morphological Group
Coccus
Rod shaped Morphological Group
Bacilli
Spiral Morphological Group
Spirillum
Direct Stain with a basic dye
Methylene Blue
Staining that dissociates
Methylene Blue (+)
Stains in which the chromatophore is negative
Acidic stains aka Cytoplasmic stains
Stains in which the chromatophore is positive
Basic stains
Fixing bacteria to a slide
bacteria is made to stick to the slide
Congo Red
Negative (acidic) staining using nigrosin or Congo Red; has a negatively charged chromatophore; easy to observe cell size and shape; cells appear as clear, colorless objects agains a dark background
Objective lends power X ocular lens power
Total Magnification
Ability of the lenses to distinguish fine detail
Resolution
Change by staining specimens
Refractive Index
Improves resolution
Oil Immersion
One of the most important staining techniques available
Gram Stain
Gram Positive
Purple
Gram Negative
Pink
Erythrocytes
Red blood cells
Leukocytes
White blood cells
Thrombocytes
Platelets
Composition of blood
Plasma or serum, RBC’s, WBC’s, and platelets
Contain the red pigment hemoglobin and are the most abundant
Red blood cells
Globin
polypeptide in RBCs
Heme
Complex iron-containing structure in RBCs
Basic functional unit of a mature compact bone
Cylindrical Osteon
Mature bone cells
Osteocytes: found in outer portions of the osteon of the bone and shafts of long bones; Dark spots on outer ring of the central canal; provides great strength and support
Usually round, with relatively thick walls; Rippled
Artery
Usually flattened or collapsed with relatively thin walls; Smooth
Vein
Nitrogen containing compounds of high molecular weight found associated with proteins in the cell
Nucleic Acids
Nucleoproteins
Nucleic acid-protein complexes
Two main groups of nucleic acids
RNA and DNA
Fundamental building blocks of nucleic acids
Nucleotides
Two classes of nitrogenous in nucleic acids
Purines and Pyrimidines
Adenine and Guanine
Purines
Cytosine, Uracil, and Thymine
Pyrimidines
The sugar is covalently linked to a nitrogen of the purine or pyrimidine base
Nucleosides
A hydroxyl group on the sugar of the nucleoside is covalently linked in an ester bond with phosphoric acid
Nucleotides
Macromolecules in which the nucleotides are linked by phosphodiester bonds between 3’ and 5’ positions of the sugars
Nucleic acids
Function of DNA
to act as the store of genetic information and to control the synthesis of proteins in the cell
Separating solutes in a mixture using a stationary phase and a mobile phase
Paper Chromatography
Carried out by placing samples to be analyzed on strips or sheets of filter paper and allowing an organic solvent saturated with water to flow slowly up the paper by capillary action
Paper chromatography
The migration rate of the solute in the direction of solvent flow is defined as
the Rf value
Alpha-hydroxylevulinaldehyde reacts with __________ to give blue complex
Diphenylamine
_________ reacts with the furfural in the presence of ferric chloride to yield a green color
Orcinol
Conduct action potentials, store information and in some way integrate and evaluate data
Neurons
6-amino purine
Adenine
5 Nitrogens and No Oxygens
Adenine
2-amino-6-oxy purine
Guanine
5 Nitrogen and 1 Oxygen
Guanine
2-oxy-4-oxy-methyl pyrimidine
Thymine
2 Nitrogen 2 Oxygen and 1 CH3
Thymine
2-oxy-4-amino pyrimidine
Cytosine
3 Nitrogen and 1 Oxygen
Cytosine