Lab Exercise 2 Flashcards
The term, prokaryote, means
before a nucleus.
Which is NOT TRUE of bacteria?
The majority of bacteria can cause disease.
Identify the shape of the bacteria in the picture above. (round rectangular shaped)
Bacillus
Gram-negative bacteria have a_____(thicker/thinner) layer of peptidoglycan and lipopolysaccharides are_____(absent/present).
thinner and present
Gram negative bacteria are stained reddish-pink by a stain called
safranin
The atmosphere’s first oxygen is believed to have been produced by a group of specialized bacteria called
cyanobacteria
The organisms in the question above produce oxygen by what process?
photosynthesis
Identify the genus of the organism pictured above.
Nostoc
How many chromosomes are in a bacterial cell?
one
Gram-positive bacteria are more resistant to the affects of antibiotics.
false
An _ _ _ _ contains a copy of a bacteria’s genetic material, encased by a heavy protective coat, and is able to survive unfavorable conditions.
Endospore
Put the following in order, as they would occur on a bacteria, from inside to outside.
Plasma membrane, cell wall, capsule
The characteristic shape, size, color, surface appearance, and texture of a bacteria is known as its _ _ _ _ . (Hint: 2 words)
Colony morphology
Pili may be used for attachment but are also used to transfer genes, in the form of a plasmid, from one bacteria to another, a process called
conjugation
A________ is any substance that may cause disease.
pathogen
Many organisms can be pathogens, including bacteria, viruses, protist, fungi, and chemicals that damage body tissue.
true
When a pathogen is introduced into the body by another animal, that animal is acting as a biological _ _ _ _ _.
vector
When an epidemic spreads around the world, it is called a
Pandemic
