The hydrolysis of sucrose to glucose and fructose is a spontaneous reaction inside our bodies. However, if you dissolve sucrose in water and keep the solution overnight at room temperature, there is no detectable conversion to glucose and fructose
Why not?
A) The activation energy of the reaction decreases.
B) The energy of the products is higher than that of the energy of the reactants.
C) The reaction is endergonic.
D) The reaction requires a catalyst.
E) The reaction is at equilibrium.
D
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In knockout experiments,
a. genes are added to chromosomes. b. normal genes are replaced physically by mutated genes. c. genes are mutated or deleted to prevent their expression. d. mRNAs are prevented from attaching to ribosomes. e. the protein products of specific genes are inactivated.
Which of the following is false?
a. The outer coats of all viruses are alike. b. The virus contains either DNA or RNA at its core, but not both. c. Viruses infect organisms in all three domains of life. d. Most viruses have a protein coat or covering. e. Some viruses benefit us indirectly
Each of the following requires 12 carbon atoms. Which of the arrangements of carbon atoms has the greatest entropy?
A) 12 molecules of carbon dioxide, CO2 B) 2 molecules of the monosaccharide glucose, C6H12O6 C) 4 molecules of the monosaccharide pyruvate, C3H4O3 D) 1 molecule of the disaccharide maltose, C12H22O11
A certain wastewater treatment plant uses aerobic bacteria, anaerobic bacteria, and archaebacteria during secondary treatment of sewage. Unfortunately, during a bad blizzard the aerated tanks froze, killing the microbes inside. What is likely to result?
A. Solid material will not be effectively filtered out. B. Methane production will go down. C. Floc levels will diminish. D. Floc will not be effectively filtered out.