The molecule that fits into the active site of an enzyme and reacts with the enzyme is
A. always a carbohydrate.
B. an analog.
C. always a protein.
D. always broken down by the enzyme.
E. a substrate.
E. a substrate.
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Which of the following statements is true regarding steroid hormones? Select all correct choices
A. They are hydrophilic B. They are hydrophobic C. They have structures similar to cholesterol D. They are composed of single aromatic amino acids E. They bind to cell surface receptors F. They bind to cytoplasmic receptors
In the 1920s and 1930s, terrible dust storms carried away tons of good soil from farmland in western Oklahoma. Which of the following would be a result?
A) reduction in carrying capacity B) massive immigration C) exponential growth of human population D) shortening of the doubling rate
According to the above figure, which letter corresponds to the area where water is absolutely not reabsorbed?
A. A B. B C. C D. D E. E
Ignaz Semmelweis demonstrated the importance of (antisepsis/vaccination/washing) as a means of preventing disease transmission
What will be an ideal response?