test 1 Flashcards
Order of metric units
Meter 1
Centimeter 0.01
Millimeter 0.001
Micrometer 0.000001
Nanometer 0.000000001
binocular dissecting microscope studies?
larger 3d object at low magnification
Compound Microscope studies?
small thinly sliced objects under higher magnification than binoculars
What are the 2 lenses in coumpound microscope?
- ocular lense: near eyes
- objective lense: near object
How do you improve contrast in compound microscope?
stains, dyes (iodine)
how do Transmission Electron Microscope work?
use beam of electrons magnified on photographic plate using electromagnets
how are Transmission Electron Microscope objects contrasted?
thin sliced + treated with metal salts for contrast
Scanning electron microscope
gives 3d dimensions with smaller objects
What microscope part holds the eyepiece lenses that account for different eye ability?
Binocular Head
What are the 2 lenses located on binocular head of dissecting mocroscope?
eyepiece lenses
What is the large black knob located on the arm of the binocular dissecting microscope? what does it do?
Focusing knob; changes focus of both eyepieces together
What is the knob built into the binocular head of the dissecting microscope? what does it do?
Magnification changing knob; zooms in simultaneously
What lights up the object from about on the dissecting microscope?
illuminator
What are the different magnifying power on compound microscopes?
4, 10, 40, 100
What part of the compound microscope holds the nose piece and eyepiece and conducts light?
body tube
What does the 4 lense do on the compound microscope?
scanning power objective; scans the whole slide
What does the 10 lense on compound microscopes do?
low power objective; vews object in greater detail
What does the 40 lense do on the compound microscope?
What does the 100 lense do on the compound microscope?
oil immersion; used with immersion oil to see with greatest magnification
what do you use to bring object into approx focus?
coarse adjustment knob
What is used on compound microscope to bring into final focus?
fine adjustment knob
what is below the stage and used to focus the light on a compound microscope?
condensor
how are objects seen through the lense?
upside down
If an object is in focus at a low power and also in focu at a high power it is?
parfocal (compound microscope)
What is final item placed on wet mount before viewing with a microscope?
cover slip
What does arrow stand for in chemical reactions?
change
reactants in enzymatic reaction are called?
substrate
where on an enzyme do substrates come together?
active site
If enzyme is boiled, what happens to enzyme?
becomes counter productive
If enzyme is warmed, what happens to its activity?
speeds up
a control for effect of warm temp would lack?
pH concentration
if more enzyme used, what happens to smount of product per unit time?
increases
what must be held constant when testing effect of enzyme concentration on enzyme activity?
pH temp
What product of catalase reaction causes bubbling?
02
What is varied when testing effect of pH on enzyme activity?
pH level
If pH is unfavorable, what happens to enzyme activity?
decreases
During what stage does DNA replication occur?
interphase
what phase do sister chromatids separate?
anaphase
what process does cytoplasm of human cell separate?
cytokinesis
in what phase do duplicated chromosomes first appear?
prophase
where does meiosis occur?
in sex organs
what structure in plants cells accomodate cytokinesis?
cell plate
what are chromosomes that look alike and carry genes fr same traits?
homologues
At what phase do homolgues separate?
anaphase
What is a dihybrid cross?
when 2 dihybrid individuals (AaBb) reproduce the phenotypic ratio is 9:3:3:1
Sex linked genes
genes located on sex chromosomes that afect traits other than sex (color blindness)
How do you calculate volume?
length x width x depth
