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2013-11-29 19:34:26

Definitions flashcards
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  1. Total Magnification
    calculated by multiplying the magnification of the eyepiece by the magnification of the objective lense
  2. Compound Microscope
    light microscope that has two lens systems: the objective and the eyepiece
  3. Parfocal
    Lens that stays in focus when magnification/focal length is changed.
  4. Parcentered
    the object in the center of view will remain in the center when the objective is rotated
  5. Binocular
    adapting for or using both eyes
  6. Depth of Field
    • the distance between the nearest and the furthest objects that give an image judged to be in focus in
  7. Field of View
    The extent of the visible image field that can be seen
  8. Working Distance
    distance between the front lens of the objective and the coverslip
  9. Osmosis
    Process by which molecules of a solvent pass through a semipermeable membrane, equalizing the concentrations on each side
  10. Facilitated Diffusion
    process of passive transport which molecules diffuse across membranes with the help of transport proteins
  11. Active Transport
    the movement of ions across a cell membrane into a region of higher concentration assisted by enzymes which require energy
  12. Passive Transport
    transport of a substance across a cell membrane by diffusion that does not require energy
  13. Tonicity
    the state of a solution in respect of osmotic pressure
  14. Hypotonic
    lower osmotic pressure
  15. Hypertonic
    Increased pressure
  16. Isotonic
    having the same pressure
  17. Nucleotides
    a compound of nucleosides linked to a phosphate group
  18. Semi-conservative replication
    the synthesis of DNA consists of 1/2 original DNA strand and 1/2 new DNA
  19. Anti-parallel
    When one strand of the DNA runs in the 5' to 3' direction and the opposite strands runs in the 3' to 5' direction
  20. Codon
    a sequence of three nucleotides that together form a unit of genetic code in a DNA or RNA molecule
  21. Anticodon
    A sequence of three adjacent nucleotides in transfer RNA that binds to a corresponding codon in messenger RNA and designates a specific amino acid during protein synthesis
  22. Haploid
    having a single set of unpaired chromosomes
  23. Diploid
    containing two complete sets of chromosomes, one from each parent.
  24. Homologous pairs
    A pair of chromosomes having the same gene sequences, each derived form one parent
  25. Sister chromatids
    when a single chromosome is replicated into two copies of itself
  26. Chromosome
    Long strands of DNA and proteins that contain hereditary information
  27. Centromere
    the point on a chromosome by which it is attached to a spindle fiber during cell division.
  28. Kinectochore
    another term for centromere
  29. Crossing-over
    the exchange of genes between homologous chromosomes, resulting in a mixture of parental characteristics in offspring.