Upgrade to remove ads
Micro lab 1
Terms in this set (29)
A taxonomic level consisting of a group of similar species
A group of organisms that are closely related and usually capable of interbreeding to produce fertile offspring. Ranking below genus.
How do you correctly write the scientific name of a microorganism?
The first letter of the genus should be capitalized while species name should be in lower case letters. Both of these are italicized or underlined
What is a centimeter?
Cm= 10-2m OR 1/100m
What is a millimeter?
Mm= 10-3m OR 1/1000m
What is a milliliter?
Ml= 10-3l OR 1/1000 l
What is a micrometer?
10-6m OR 1/1,000,000m
What is a microliter?
10-6 l or 1/1000,000 l
What is a nanometer?
Nm= 10-9 m or 1/1,000,000,000 m
What is the average sized rod shape bacterium in micrometers?
0.5-1.0 micrometer wide by 1.0-4.0 micrometer long
What is the diameter of an average sized coccus shaped bacterium in micrometers?
State the reason for using immersion oil at 1000X:
The immersion oil traps the light and prevents distortion effect that is seen as a result of the bending of the light waves
Define ocular lens:
Eyepiece of a microscope, 10X magnification
Define objective lens:
The lens closest to the object. Can magnify 4X, 10X, 40X, 100X
A micrometer is?
A milliliter is?
Bacteria are unicellular _____ microorganisms that divide by ____ ___, a process by which one bacterium splints into two
Prokaryotic; binary fission
What are the three common shapes o bacteria?
Most cocci are approx ____ - ____ micrometer in diameter
A division in one plane produces either a ____ arrangement or a ______ arrangement
Diplococcus ( cocci in pairs)
Streptococcus (cocci in chains)
A division in 2 planes produces what type of arrangement?
Tetrad arrangement ( cocci forming in square of 4)
Division in 3 planes produces a ___ arrangement?
Sarcina arrangement ( cocci forming a cube of eight)
***since tetrad and sarcina are hard to tell with conventional microscope, state this is either sarcina or tetrad)
A bacillus is a ____ shape bacterium having one of the following arrangements:
Bacillus- a single bacillus
Streptobacillus- bacilli in chains
Coccobacillus- oval and similar to coccus
What is the size of bacillus in micrometers?
0.5-1.0 wide and from 1.0-4.0 long
Spiral shaped bacteria occur in one of three forms:
Vibrio- an incomplete spiral or comma shaped
Spirillum- a thick, rigid spiral
Spirochete- a thin flexible spiral
The spiral shaped bacteria range from ___ to ____ micrometer long
The common bakers yeast is called _____ ___ which are ____. Yeast cells are ____ (prokaryotic or eukaryotic). They usually appear _____ and are ___ to ___ micrometer in diameter.
Saccharomyces cerevisiae; unicellular; eukaryotic
List and describe the 5 different arrangements of cocci:
1. Diplococcus- cocci arranged in pairs
2. Streptococcus- cocci in chains
3. Tetrad- cocci in squares of 4
4. Sarcina— cocci in cubes of 8
5. Staphylococcus- cocci irregular, often grapelike clusters
List and describe 2 different arrangements of bacilli:
1. Streptobacillus- bacilli in chains
2. Coccobacillus- oval and similar to a coccus
You might also like...
Unit 3 Science
BSC2011L Week 3
MICRO 150 - Lab Exam
Microbiology LAB--- Test Review
Other sets by this creator
NURN218 menstrual cycle
Nursing Exam 6- Oxygenation
Nursing Exam 5-mental health
Nursing Exam #4