AP Bio Chapter 8

B) exergonic; endergonic

1) 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

C) temperature is usually uniform throughout a cell

2) 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 denatures enzymes.

B) C6H12O6 + 6 O2 6 CO2 + 6H2O

3) Which of the following metabolic processes can occur without a net influx of energy from some other process? A) ADP + Pi ATP + H2O B) C6H12O6 + 6 O2 6 CO2 + 6H2O C) 6 CO2 + 6 H2O C6H12O6 + 6 O2 D) amino acids protein E) glucose + fructose sucrose

A) add more of the enzyme.

4) If an enzyme 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) heat the solution to 90°C. C) add more substrate. D) add an allosteric inhibitor. E) add a noncompetitive inhibitor.

E) Nothing; the reaction would stay at equilibrium.

5) If an enzyme is added to a solution where its substrate and product are in equilibrium, what would occur? A) Additional product would be formed. B) Additional substrate would be formed. C) The reaction would change from endergonic to exergonic. D) The free energy of the system would change. E) Nothing; the reaction would stay at equilibrium.

C) their enzymes have high optimal temperatures.

6) Some bacteria are metabolically active in hot springs because A) they are able to maintain a cooler 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.