The active site of an enzyme is
A) the region of a substrate that is changed by an enzyme.
B) the highly changeable portion of an enzyme that adapts to fit the substrates of various reactions.
C) the region of an enzyme that attaches to a substrate.
D) the region of a product that detaches from the enzyme.
Answer: C
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The letter “A” in the above figure represents
a. transverse. b. radial. c. tangential. d. elliptical. e. obtuse.
P elements in Drosophila contribute to the process of hybrid dysgenesis, which occurs when M-cytotype females are crossed with P-cytotype males
What does the model of hybrid dysgenesis predict for the F1 and F2 generations when a P-cytotype male is crossed to an M-cytotype female?
Which of the following would we say is unrestricted growth rate?
A) exponential growth B) immigration C) logistic growth D) S-shaped growth
Nitrogen-fixing bacteria convert atmospheric nitrogen (N2 gas) into ammonium (NH4). Why is this conversion important for life on Earth?
A) Ammonium is an important cleaning agent. B) Nitrogen gas is toxic. C) Ammonium is a very important plant nutrient. D) Nitrogen gas leads to global warming.