Micro Ch. 3 Test Bank
The sum of all biosynthetic reactions in a cell is known as
A) metabolism.
B) anabolism.
C) catabolism.
D) synthatabolism. - ANSB
Based on the functional roles of phosphate in various microbial metabolisms, deduce which
compounds phosphate exists as in microorganisms.
A) organic compounds
B) inorganic compounds
C) both organic and inorganic compounds
D) neither organic nor inorganic compounds - ANSC
Which of the following would be used by a chemoorganotroph for energy?
A) C2H3O2-
B) H2
C) CO2
D) H+ - ANSA
Which of the following statements is FALSE?
A) Most bacteria are capable of using ammonia as their sole nitrogen source.
B) Some bacteria are able to use nitrates or nitrogen gas as their nitrogen source.
C) Most available nitrogen is in organic forms.
D) Nitrogen is a major component of proteins and nucleic acids. - ANSC
All microorganisms require
A) carbon, iron, and sodium.
B) phosphorus, aluminum, and sodium.
C) calcium, potassium, and magnesium.
D) phosphorus, selenium, and sulfur. - ANSD
Which element functions BOTH as an enzyme cofactor and as a stabilizer of ribosomes and
nucleic acids?
A) iron
B) hydrogen
C) zinc
D) magnesium - ANSD
Based on your understanding of metabolism, generalize when an enzyme's rate of activity can
be changed.
, A) before enzyme production
B) during enzyme production
C) after enzyme production
D) at any point-before, during, or after enzyme production - ANSC
The change in Gibbs free energy for a particular reaction is MOST useful in determining
A) the amount of energy catalysts required for biosynthesis or catabolism.
B) the potential metabolic reaction rate.
C) whether there will be a requirement or production of energy.
D) energy stored in each compound. - ANSC
Which is an example of a micronutrient?
A) arginine
B) inorganic phosphorous
C) iron
D) vitamin B12 - ANSC
Aseptic technique refers to
A) the microbial inoculum placed into a test tube or onto a Petri plate.
B) a series of practices to avoid contamination.
C) the autoclave and other sterilizing procedures.
D) cleanliness in the laboratory. - ANSB
To ensure growth of a newly discovered bacterium with unknown nutritional requirements, it
would be best to begin with a ________ medium rather than a ________ medium.
A) complex / minimal
B) minimal / complex
C) selective / complex
D) selective / differential - ANSA
If ΔG0' is negative, the reaction is
A) exergonic and requires the input of energy.
B) endergonic and requires the input of energy.
C) exergonic and energy will be released.
D) endergonic and energy will be released. - ANSC
Activation energy is the energy
A) required to transform all reactants into their reactive state.
B) given off as the products in a chemical reaction are formed.
C) absorbed as ΔG0' moves from negative to positive.
D) needed by an enzyme to catalyze a reaction without coenzymes. - ANSA
A catalyst
A) requires more reactants but makes the reaction rate faster.
The sum of all biosynthetic reactions in a cell is known as
A) metabolism.
B) anabolism.
C) catabolism.
D) synthatabolism. - ANSB
Based on the functional roles of phosphate in various microbial metabolisms, deduce which
compounds phosphate exists as in microorganisms.
A) organic compounds
B) inorganic compounds
C) both organic and inorganic compounds
D) neither organic nor inorganic compounds - ANSC
Which of the following would be used by a chemoorganotroph for energy?
A) C2H3O2-
B) H2
C) CO2
D) H+ - ANSA
Which of the following statements is FALSE?
A) Most bacteria are capable of using ammonia as their sole nitrogen source.
B) Some bacteria are able to use nitrates or nitrogen gas as their nitrogen source.
C) Most available nitrogen is in organic forms.
D) Nitrogen is a major component of proteins and nucleic acids. - ANSC
All microorganisms require
A) carbon, iron, and sodium.
B) phosphorus, aluminum, and sodium.
C) calcium, potassium, and magnesium.
D) phosphorus, selenium, and sulfur. - ANSD
Which element functions BOTH as an enzyme cofactor and as a stabilizer of ribosomes and
nucleic acids?
A) iron
B) hydrogen
C) zinc
D) magnesium - ANSD
Based on your understanding of metabolism, generalize when an enzyme's rate of activity can
be changed.
, A) before enzyme production
B) during enzyme production
C) after enzyme production
D) at any point-before, during, or after enzyme production - ANSC
The change in Gibbs free energy for a particular reaction is MOST useful in determining
A) the amount of energy catalysts required for biosynthesis or catabolism.
B) the potential metabolic reaction rate.
C) whether there will be a requirement or production of energy.
D) energy stored in each compound. - ANSC
Which is an example of a micronutrient?
A) arginine
B) inorganic phosphorous
C) iron
D) vitamin B12 - ANSC
Aseptic technique refers to
A) the microbial inoculum placed into a test tube or onto a Petri plate.
B) a series of practices to avoid contamination.
C) the autoclave and other sterilizing procedures.
D) cleanliness in the laboratory. - ANSB
To ensure growth of a newly discovered bacterium with unknown nutritional requirements, it
would be best to begin with a ________ medium rather than a ________ medium.
A) complex / minimal
B) minimal / complex
C) selective / complex
D) selective / differential - ANSA
If ΔG0' is negative, the reaction is
A) exergonic and requires the input of energy.
B) endergonic and requires the input of energy.
C) exergonic and energy will be released.
D) endergonic and energy will be released. - ANSC
Activation energy is the energy
A) required to transform all reactants into their reactive state.
B) given off as the products in a chemical reaction are formed.
C) absorbed as ΔG0' moves from negative to positive.
D) needed by an enzyme to catalyze a reaction without coenzymes. - ANSA
A catalyst
A) requires more reactants but makes the reaction rate faster.
