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Nainai321
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Total Magnification
calculated by multiplying the magnification of the eyepiece by the magnification of the objective lense
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Compound Microscope
light microscope that has two lens systems: the objective and the eyepiece
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Parfocal
Lens that stays in focus when magnification/focal length is changed.
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Parcentered
the object in the center of view will remain in the center when the objective is rotated
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Binocular
adapting for or using both eyes
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Depth of Field
- the distance between the nearest and the furthest objects that give an image judged to be in focus in
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Field of View
The extent of the visible image field that can be seen
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Working Distance
distance between the front lens of the objective and the coverslip
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Osmosis
Process by which molecules of a solvent pass through a semipermeable membrane, equalizing the concentrations on each side
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Facilitated Diffusion
process of passive transport which molecules diffuse across membranes with the help of transport proteins
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Active Transport
the movement of ions across a cell membrane into a region of higher concentration assisted by enzymes which require energy
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Passive Transport
transport of a substance across a cell membrane by diffusion that does not require energy
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Tonicity
the state of a solution in respect of osmotic pressure
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Hypotonic
lower osmotic pressure
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Hypertonic
Increased pressure
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Isotonic
having the same pressure
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Nucleotides
a compound of nucleosides linked to a phosphate group
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Semi-conservative replication
the synthesis of DNA consists of 1/2 original DNA strand and 1/2 new DNA
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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
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Codon
a sequence of three nucleotides that together form a unit of genetic code in a DNA or RNA molecule
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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
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Haploid
having a single set of unpaired chromosomes
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Diploid
containing two complete sets of chromosomes, one from each parent.
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Homologous pairs
A pair of chromosomes having the same gene sequences, each derived form one parent
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Sister chromatids
when a single chromosome is replicated into two copies of itself
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Chromosome
Long strands of DNA and proteins that contain hereditary information
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Centromere
the point on a chromosome by which it is attached to a spindle fiber during cell division.
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Kinectochore
another term for centromere
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Crossing-over
the exchange of genes between homologous chromosomes, resulting in a mixture of parental characteristics in offspring.
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