Lab Safety
All unauthorized experiments are...
prohibited
How do bacteria reproduce?
Binary Fission
Bacteria survive unfavorable conditions by doing this.
forming endospores
The lens inside the eyepiece of a light microscope is which lens?
Ocular lens
The step we always start with when using dichotomous keys.
Step 1
Which chemicals in the lab are to be considered dangerous?
All chemicals
What do bacteria need to best grow?
Warmth, neutral pH, and moisture
Flagella
The wheel under the stage on a light microscope which adjusts the amount of light is called:
diaphragm
What color do gram positive bacteria stain?
Blue or Purple
What do we do when we finish working with chemicals, biological specimens, and other lab substances?
Wash our hands thoroughly with soap and water
Bacteria that prefer to grow without oxygen, but are capable of growing in the presence of oxygen are called what?
Facultative Anaerobes
This allows bacteria to adhere to solid surfaces, and keeps the bacteria from drying out.
Capsule
Passing a smear prepared slide through a Bunsen burner flame or placed on a hot plate is called:
Heat fixing
What color do gram negative bacteria stain?
Pink or red
What do we do with glassware before starting an experiment?
Read directions, examine it for chips and cracks, clean it if necessary
Microbial growth refers to an increase in what?
Number of bacteria
Where are ribosomes found in prokaryotic cells?
Within the cytoplasm
The first objective lens that is used when focusing a specimen.
Scanning lens
What is the hardest step of a gram stain?
The decolorization step.
Eye protection is used when:
Any time chemicals, heat, or glassware are used
Bacteria that can only grow in an oxygenated environment are called what?
Obligate Aerobes
This is the circular bits of DNA material located in prokaryotes, that they sometimes pass on to other bacteria using conjugation.
Plasmid
A culture with unwanted microorganisms present is called:
contaminated culture
What is the gram stain used for?
Differentiation of bacteria