Enzymes can lower the activation energy of a chemical reaction by
A) stabilizing the transition state.
B) properly positioning reactants.
C) properly positioning reactants and stabilizing the transition state.
D) raising the temperature so that reactants collide more forcefully.
E) properly positioning reactants and raising the temperature so that reactants collide more forcefully.
Answer: C
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____ is the best studied species of bacteria
a. Rhizobium sp. b. Prevotella copri c. E. coli d. G. lamblia e. Agrobacterium sp.
Isolating mechanisms that prevent reproductive attempts or make it unlikely that reproductive attempts will be successful are referred to as
A. prezygotic reproductive isolating mechanisms. B. postzygotic isolating mechanisms. C. postgametic isolating mechanisms. D. pregametic isolating mechanisms. E. None of the answer choices are correct.
The lower end of the uterus is nearly closed by a ring of connective tissue called the ________
Fill in the blank(s) with correct word
Which of the following statements is TRUE?
A. Once a person reaches maturity, cell division stops except to repair wounds. B. Cell division in an adult signifies cancer. C. Select cells throughout the body retain the ability to divide and replace themselves. D. Cells making up a multicellular individual are not considered to be individually “alive.” E. All cells retain the ability to divide even after the organism reaches maturity.