________ proposed that polypeptides and RNA evolved simultaneously.
A. Graham Cairns-Smith
B. Aleksander Oparin
C. Thomas Cech
D. Stanley Miller
E. Sidney Fox
Answer: A
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A new antibiotic has been developed that inhibits the activity of an enzyme by competitive inhibition. What effect will this have on the activation energy of the enzyme-catalyzed reaction?
A. The activation energy required for the reaction in the presence of the antibiotic would be greater than the activation energy required in the absence of the antibiotic B. The activation energy required for the reaction in the presence of the antibiotic would be less than the activation energy required in the absence of the antibiotic C. The activation energy required for the reaction in the presence of the antibiotic will be the same as the activation energy required in the absence of the antibiotic
Ultimately, for aerobic organisms, where does
the energy in ATP come from?
a. glucose b. pyruvate c. water d. NADPH e. sunlight
Mutations can be
a. neutral. b. beneficial. c. lethal. d. heritable. e. all of these
Mitochondrial diseases ________
A) are caused only by spontaneous mitochondrial DNA mutations B) are very rare; only a couple of people are diagnosed per year C) cannot be inherited from the mother D) None of the above is true.