Test Bank Brock Biology of Microorganisms14th Edition By Michael T. Madigan1) The sum of all biosynthetic reactions in a cell is known asBased on the
... [Show More] functional roles of phosphate in various microbial metabolisms, deduce which compounds phosphate exists as in microorganismsWhich of the following would be used by a chemoorganotroph for energy?) All microorganisms require 1. A) carbon, iron, and sodium. 2. B) phosphorus, aluminum, and sodium. 3. C) calcium, potassium, and magnesium. 4. D) phosphorus, selenium, and sulfur.Which element functions BOTH as an enzyme cofactor and as a stabilizer of ribosomes and nucleic acids?Based on your understanding of metabolism, generalize when an enzyme’s rate of activity can be changed. 1. A) before enzyme production 2. B) during enzyme production 3. C) after enzyme production 4. D) at any point–before, during, or after enzyme productionThe change in Gibbs free energy for a particular reaction is MOST useful in determining 1. A) the amount of energy catalysts required for biosynthesis or catabolism. 2. B) the potential metabolic reaction rate. 3. C) whether there will be a requirement or production of energy. 4. D) energy stored in each compound.) Which is an example of a micronutrient? 1. A) arginine 2. B) inorganic phosphorous 3. C) iron 4. D) vitamin B12Aseptic technique refers to 1. A) the microbial inoculum placed into a test tube or onto a Petri plate. 2. B) a series of practices to avoid contamination. 3. C) the autoclave and other sterilizing procedures. 4. D) cleanliness in the laboratory.11) 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. 1. A) complex / minimal 2. B) minimal / complex 3. C) selective / complex 4. D) selective / differential) If ΔG0′ is negative, the reaction is 1. A) exergonic and requires the input of energy. 2. B) endergonic and requires the input of energy. 3. C) exergonic and energy will be released. 4. D) endergonic and energy will be released.3) Activation energy is the energy 1. A) required to transform all reactants into their reactive state. 2. B) given off as the products in a chemical reaction are formed. 3. C) absorbed as ΔG0′ moves from negative to positive. 4. D) needed by an enzyme to catalyze a reaction without coenzymes15) The portion of an enzyme to which substrates bind is referred to as the 1. A) substrate complex. 2. B) active site. 3. C) catalytic site. 4. D) junction of van der Waals forces.16) What is the difference between a coenzyme and a prosthetic group? 1. A) Coenzymes are essential for an enzyme’s function and prosthetic groups only enhance its reaction rate. 2. B) Coenzymes are weakly bound whereas prosthetic groups are strongly bound to their respective enzymes. 3. C) Coenzymes are organic cofactors and prosthetic groups are inorganic cofactors. 4. D) Coenzymes require additional ions to bind to enzymes but prosthetic groups are able to directly interact with enzymes.20) A chemoorganotroph and a photoautotroph in the same environment would NOT compete for 1. A) oxygen. 2. B) carbon. 3. C) nitrogen. 4. D) carbon and oxygen [Show Less]