Which curves on the graphs may represent the temperature and pH profiles of an enzyme taken from a bacterium that lives in a mildly alkaline hot springs at temperatures of 70°C or higher?
A) curves 1 and 5
B) curves 2 and 5
C) curves 3 and 4
D) curves 3 and 5
D
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The nucleus of an atom is composed of
A. protons. B. neutrons. C. electrons. D. protons and neutrons. E. protons and electrons.
Cells of multicellular eukaryotes have receptors that can recognize approximately ____ pathogen-associated molecular
patterns (PAMPs).
a. 10 b. 100 c. 1,000 d. 10,000 e. 100,000
In the equation, C6H12O6 + 6O2 ? 6CO2 + 6H2O, ATP and heat would be on which side of the reaction?
A. It could appear on either side because this reaction is in equilibrium. B. The reactants because this is an exergonic reaction. C. The products because this is an exergonic reaction. D. The products because this is an endergonic reaction. E. The reactants because this is an endergonic reaction.
A reducing medium contains
A. hemoglobin, vitamins, or other growth factors. B. sugars that can be fermented. C. extra oxygen. D. substances that remove oxygen. E. inhibiting agents.