Microbiology 290 - WCU - Quiz #1 (2026-2027)
UPDATE EXAM 125 QUESTIONS WITH
MULTIPLE CHOICES VERIFIED & REVISED
ANSWERS (NEW)!!
Acidophile - CORRECT ANSWER: an organism that grows best at low pH; typically below pH
6
Aerobes - CORRECT ANSWER: Bacteria that require oxygen to grow
Aerobic Respiration - CORRECT ANSWER: Respiration that requires oxygen
Anabolic - CORRECT ANSWER: - Synthesize large molecules from the smaller products
- Endorgonic (require more energy than they release)
- Use some energy of ATP by breaking a phosphate bond
Anaerobes - CORRECT ANSWER: Bacteria that grow in the absence of oxygen and are
destroyed by oxygen
Anerobic Respiration - CORRECT ANSWER: Respiration that does not require oxygen
Assume the diameter of the field of vision in your microscope is 5mm under low power. If one
bacterial cell is 2um, how many bacterial cells could fit across the field? - CORRECT
ANSWER: 2um/1,000 um x 1mm = 0.005
Autotrophic organism - CORRECT ANSWER: An organism capable of synthesizing its own
food from inorganic substances, using light or chemical energy. Green plants, algae, and certain
bacteria are autotrophs.
,Autotrophs - CORRECT ANSWER: Green Plants
- Algae
- Certain bacterias
Bacteria Grow Curve (Step 1) - CORRECT ANSWER: Lag Phase
Bacteria Growth Curve - Step 2 - CORRECT ANSWER: Log Phase
Bacteria Growth Curve - Step 3 - CORRECT ANSWER: Stationary Phase
Bacteria Growth Curve - Step 4 - CORRECT ANSWER: Death Phase
Bacterial Endospores - CORRECT ANSWER: - Unique structures produced by some bacteria
that are defensive strategy against unfavorable conditions
- Gram+ Rods Only
Biofilm Formation - CORRECT ANSWER: - Reversible Adhesion
- Colonization
- Co-Adhesion
- Multiplication
- Detachment and Recolonization
Capsule (slime layer) and it's importance in biofilm formation - CORRECT ANSWER: - Type of
glycocalyces
- Loosely attached to cell surface
- Water Soluble
- Sticky layer allows prokaryotes to attach to surfaces
, Catabolism - CORRECT ANSWER: - Break larger molecules into smaller products
- Exergonic (release energy)
Catalase Test - CORRECT ANSWER: used to identify organisms that produce the enzyme
catalase
Cell Capsule - CORRECT ANSWER: - Composed of organized repeating units of organic
chemicals
- Firmly attached to cell surface
- May prevent bacteria from being recognized by host
Differential Media - CORRECT ANSWER: Formulated such that either the presence of visible
changes in the medium or differences in the appearance of colonies help to defferentiate among
the kinds of bacteria growing on the medium
- Example: organisms ultilization of red blood cells in blood agar.
Discoverer of Microscopes - CORRECT ANSWER: Antoni van Leeuwenhoek
Electron Microscope - CORRECT ANSWER: - Greater resolving power and magnification
- Magnifies objects 10,000x to 100,000x
- Detailed view of bacteria, viruses, ultrastructures, and large atoms
- Transmission electron microscopes (TEM)
- Uses chemicals containing heavy metals
- Absorbs electrons
- Scanning Electron Microscopes (SEM)
End product of fermentation - CORRECT ANSWER: Alcohol is produced
UPDATE EXAM 125 QUESTIONS WITH
MULTIPLE CHOICES VERIFIED & REVISED
ANSWERS (NEW)!!
Acidophile - CORRECT ANSWER: an organism that grows best at low pH; typically below pH
6
Aerobes - CORRECT ANSWER: Bacteria that require oxygen to grow
Aerobic Respiration - CORRECT ANSWER: Respiration that requires oxygen
Anabolic - CORRECT ANSWER: - Synthesize large molecules from the smaller products
- Endorgonic (require more energy than they release)
- Use some energy of ATP by breaking a phosphate bond
Anaerobes - CORRECT ANSWER: Bacteria that grow in the absence of oxygen and are
destroyed by oxygen
Anerobic Respiration - CORRECT ANSWER: Respiration that does not require oxygen
Assume the diameter of the field of vision in your microscope is 5mm under low power. If one
bacterial cell is 2um, how many bacterial cells could fit across the field? - CORRECT
ANSWER: 2um/1,000 um x 1mm = 0.005
Autotrophic organism - CORRECT ANSWER: An organism capable of synthesizing its own
food from inorganic substances, using light or chemical energy. Green plants, algae, and certain
bacteria are autotrophs.
,Autotrophs - CORRECT ANSWER: Green Plants
- Algae
- Certain bacterias
Bacteria Grow Curve (Step 1) - CORRECT ANSWER: Lag Phase
Bacteria Growth Curve - Step 2 - CORRECT ANSWER: Log Phase
Bacteria Growth Curve - Step 3 - CORRECT ANSWER: Stationary Phase
Bacteria Growth Curve - Step 4 - CORRECT ANSWER: Death Phase
Bacterial Endospores - CORRECT ANSWER: - Unique structures produced by some bacteria
that are defensive strategy against unfavorable conditions
- Gram+ Rods Only
Biofilm Formation - CORRECT ANSWER: - Reversible Adhesion
- Colonization
- Co-Adhesion
- Multiplication
- Detachment and Recolonization
Capsule (slime layer) and it's importance in biofilm formation - CORRECT ANSWER: - Type of
glycocalyces
- Loosely attached to cell surface
- Water Soluble
- Sticky layer allows prokaryotes to attach to surfaces
, Catabolism - CORRECT ANSWER: - Break larger molecules into smaller products
- Exergonic (release energy)
Catalase Test - CORRECT ANSWER: used to identify organisms that produce the enzyme
catalase
Cell Capsule - CORRECT ANSWER: - Composed of organized repeating units of organic
chemicals
- Firmly attached to cell surface
- May prevent bacteria from being recognized by host
Differential Media - CORRECT ANSWER: Formulated such that either the presence of visible
changes in the medium or differences in the appearance of colonies help to defferentiate among
the kinds of bacteria growing on the medium
- Example: organisms ultilization of red blood cells in blood agar.
Discoverer of Microscopes - CORRECT ANSWER: Antoni van Leeuwenhoek
Electron Microscope - CORRECT ANSWER: - Greater resolving power and magnification
- Magnifies objects 10,000x to 100,000x
- Detailed view of bacteria, viruses, ultrastructures, and large atoms
- Transmission electron microscopes (TEM)
- Uses chemicals containing heavy metals
- Absorbs electrons
- Scanning Electron Microscopes (SEM)
End product of fermentation - CORRECT ANSWER: Alcohol is produced
