The presence of phenylpyruvic acid in urine is an indicator of ___________
A. heart disease D. spina bifida
B. colon cancer E. more than one of these
C. mental retardation
C
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Your microwave will not turn on, and you speculate that a circuit breaker in the house has been tripped. In scientific terminology, the steps would be described as:
A. forming conclusions from the results of experiments. B. developing an observation based on a hypothesis. C. developing a hypothesis based on an observation. D. testing a prediction generated from a hypothesis.
Which component of the accompanying scenario would be considered the stimulus?
a. release of insulin b. glycogen and fat synthesis c. potassium ion channel d. increased glucose levels e. liver and muscle
The equation A ? PO4 + B ? A + B ? PO4 would be catalyzed by which of the following classes of enzymes?
A) transferases B) oxidoreductases C) hydrolases D) ligases E) isomerases
A mutation in the gene for hormone A causes it to be unable to bind to its receptor protein. What do you predict will likely happen?
A) The receptor protein will not be activated and therefore will not initiate a signal transduction pathway. B) The receptor protein will change shape in order to bind with hormone A. C) The hormone will bind with a different receptor instead.