How can one increase the rate of a chemical reaction?
A. Increase the activation energy needed.
B. Cool the reactants.
C. Decrease the concentration of the reactants.
D. Add a catalyst.
E. Increase the entropy of the reactants.
D. Add a catalyst.
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New cork cambium forms within the secondary phloem
A. true B. false
Duchenne muscular dystrophy and Becker's muscular dystrophy are caused by different mutations in the same X-linked gene
a. True b. False Indicate whether the statement is true or false
Bacteria usually adapt their internal environment to match their external conditions.
A) True B) False
Considering that the digestive system is a major route of infection in most human cases of brucellosis, an investigator hypothesizes that the production of urease by the organism plays a key role as a virulence factor as well as in the organism's survival in the upper digestive tract. Indicate all of the following explanations that accurately describe the mechanism of action of the enzyme urease. Select all that apply.
a. As a result of urea hydrolysis, there is an increase in pH due to the production of ammonia. b. As a result of urea hydrolysis, there is a decrease in pH due to the production of ammonia. c. The increased production of ammonia by urea hydrolysis serves to neutralize stomach acid, promoting survival of the organism. d. The increased production of ammonia by urea hydrolysis serves to increase stomach acid, promoting survival of the organism.