Lab Exam 1
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Lab Exam 1
Lab exam 1
What are the three types of graphs commonly used?
What are the three different types of microscopes?
1. Stereo dissecting Microscope
2. Compound light Microscope
3. Electron Microscope
What are the advantages of the stereo dissecting microscope?
useful in viewing larger specimens like insects or flowers
specimens don't need to be stained or fixed
magnification of (7-30x)
What are the advantages of the compound light microscope?
uses two lenses the ocular (eye piece) and the objective
What are the advantages of the electron microscope?
able to magnify the specimen a million times
uses a beam of electrons to penetrate the specimen
requires staining and a lot of preparation and effort
how to figure out total magnification?
multiplying the magnification objective by the magnification of ocular
how to find the total magnification of objective?
By dividing the total magnification by the magnification of ocular
what does the ocular do?
lens near the eye
What does the body tube do?
keeps ocular and objective at proper distance from each other
what does the nose piece do?
Permits interchange of low, medium, and high power objectives
What does the arm do?
Supports body tube and focus knobs
What do the objectives do?
contain lenses of various magnifications
What does the coarse focus knob?
moves stage for focusing
what does the fine focus knob do?
moves the stage in smaller increments to permit exact focusing
What does the base do?
bears the weight of the microscope and house the light sources
What does the mechanical stage do?
holds slides and allows controlled movement
What does the iris diaphragm do?
Regulates amount of light illuminating the specimen
What does the illuminator do?
How many meters are there in a kilometer?
How many cm in a meter?
How many mm in a meter?
how many mm in a cm?
What is my height in cm?
What is the meniscus?
the curved line at the top of the liquid
What is the taxonomy key?
It is a key to identify unknown specimens
What is an atom?
the smallest particle of an element
what is a molecule?
A particle composted of one or more atoms held together by chemical bonds
What is an element?
a substance that cannot be broken down or converted to a simpler substance
what is a base?
substances that release hydroxide ions in solution
What is an acid?
substances that release hydrogen ions in solution
What is a macromolecule?
a molecule containing a very large number of atoms
What is the color of hydrogen and the number of bonds?
yellow and one bond
What is the color of carbon and how many bonds?
black and 4
What is the color of oxygen and number of bond sites?
red and two bonds
What is the color of nitrogen and how many bonds?
blue and three bonds
What is the test reagent of proteins?
Biuret solution (dark purple positive)
What is the test reagent of lipids?
Sudan solution (mixes with solution for positive)
What is the test regnant of starch?
iodine (dark purple positive)
What is the test reagent of glucose?
benedicts solution (orange when positive)
What is an example of a simple carbohydrate?
human cheek cell
What is prokaryotic?
single cell organisms that lack a nucleus
what is eukaryotic?
cell with a nucleus