All of the following statements about catalysts are true EXCEPT
A) catalysts increase the reaction rate.
B) catalysts are not permanently altered during reaction.
C) catalysts increase activation energy requirements.
D) biological catalysts are specific enzymes.
E) catalysts can be used repeatedly.
C
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A. interval 1 B. interval 2 C. interval 3 D. interval 4 E. interval 5
Which of the following does not stimulate phagocytes?
a. cytokines b. IFN-? c. C3b d. lipid A e. histamine
Once a scientific theory becomes a law, it
A) cannot be changed. B) cannot be challenged. C) becomes static. D) is subject to modification. E) is irrefutable.
What type of molecule is formed by combining a diglyceride with a phosphate group?
a. triglyceride b. phospholipid c. phosphatidate d. steroid