Biology 190 Chapter 8

If an enzyme in solution is saturated with substrate, the most effective way to obtain a faster yield of products is to a. add more of the enzyme b. beat the solution to 90C c. add more substrate d. add an allosteric inhibitor e. add a non competitive

a. add more of the enzyme

Which of the following metabolic processes can occur without a net influx of energy from some other process? a. ADP+P-->ATP+H2o b. C6H12O6+ 6O2-->6CO2+6H2O c. 6CO2+6H2O-->C6H12O6+6O2 d. amino acids--> sucrose e. glucose+fructose-->sucrose

b. C6H12O6+ 6O2-->6CO2+6H2O

Choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as ____ is to____. a. exergonic; spontaneous b. exergonic; endergonic c. free energy; entropy d. work; energy e. entropy; enthalpy

b. exergonic; endergonic

Most cells cannot harness heat to perform work because a. heat is not a form of energy b. cells do not have much heat; they are relatively cool c. temperature is usually uniform throughout a cell d. heat can never be used to do work e. heat must remain constant during work

c. temperature is usually uniform throughout a cell

Some bacteria are metabolically active in hot springs temperature. a. they are able to maintain a lower internal temperature b. high temperatures make catalysis unnecessary c. their enzymes have high optimal temperatures d. their enzymes are completely insensitive to temperature e. they use molecules other than proteins or RNAs as their main catalysts

c. their enzymes have high optimal temperatures

If an enzyme is added to a solution where its substrate and product are in equilibrium, what will occur? a. additional product will be formed b. additional substrate will be formed c. the reaction will change from endergonic to exergonic d. the free energy of the system will change e. nothing; the reaction will stay at equilibrium

e. nothing; the reaction will stay at equilibrium