Exam 3: BIOS 242 / BIOS242 Review (Latest 2024/ 2025 Update)
Fundamentals of Microbiology with Lab| Questions and Verified
Answers| 100% Correct| Grade A- Chamberlain
What is a heterotroph?
Organism that must obtain its carbon in organic form
What is an autotroph?
An organism that uses inorganic CO₂ as its carbon source
What is a phototroph?
Microbes that photosynthesize
What is a chemotroph?
Microbes that gain energy from chemical compounds
What is the temperature range for the optimal rate of growth for a
psychrophile?
0–15°C
What is the temperature range for the optimal rate of growth for a
mesophile?
20–40°C
What is the temperature range for the optimal rate of growth for a
thermophile?
45–80°C
What does a barophile require for growth?
High hydrostatic pressure
What is an example of a barophile?
Deep sea microbes live in 1000× atmospheric pressure
, What does a halophile require for growth?
High concentration of salt (9–25% NaCl)
What are enzymes?
Biological catalysts that increase the rate of a chemical reaction
What is needed for a reaction to occur?
Activation energy
True or false: enzymes lower the activation energy
True
Enzymes act on reactant molecules known as
Substrates
Enzymes bind and chemically change substrates into
Products
What is an apoenzyme?
Protein, composed of a sequence of amino acids
What is required for a holoenzyme?
Cofactors and coenzyme
Cofactors are elements
Inorganic
Coenzymes are elements
Organic
What are cofactors?
Metal ions that activate enzymes
Cofactors help bring the active site and substrate close together
True
Fundamentals of Microbiology with Lab| Questions and Verified
Answers| 100% Correct| Grade A- Chamberlain
What is a heterotroph?
Organism that must obtain its carbon in organic form
What is an autotroph?
An organism that uses inorganic CO₂ as its carbon source
What is a phototroph?
Microbes that photosynthesize
What is a chemotroph?
Microbes that gain energy from chemical compounds
What is the temperature range for the optimal rate of growth for a
psychrophile?
0–15°C
What is the temperature range for the optimal rate of growth for a
mesophile?
20–40°C
What is the temperature range for the optimal rate of growth for a
thermophile?
45–80°C
What does a barophile require for growth?
High hydrostatic pressure
What is an example of a barophile?
Deep sea microbes live in 1000× atmospheric pressure
, What does a halophile require for growth?
High concentration of salt (9–25% NaCl)
What are enzymes?
Biological catalysts that increase the rate of a chemical reaction
What is needed for a reaction to occur?
Activation energy
True or false: enzymes lower the activation energy
True
Enzymes act on reactant molecules known as
Substrates
Enzymes bind and chemically change substrates into
Products
What is an apoenzyme?
Protein, composed of a sequence of amino acids
What is required for a holoenzyme?
Cofactors and coenzyme
Cofactors are elements
Inorganic
Coenzymes are elements
Organic
What are cofactors?
Metal ions that activate enzymes
Cofactors help bring the active site and substrate close together
True
