You have chosen RNA as the most likely molecule to be first enclosed by a membrane. You understand that it has the ability to store information and can self-replicate, but what else is necessary for simple metabolic processes to occur in a timely manner?
A. A biological catalyst.
B. Energy from ADP.
C. A pump, to drive a concentration gradient.
D. A mechanism to control self-replication.
E. Both a mechanism to control self-replication and energy from ADP.
A. A biological catalyst.
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Which of the following represents the true evolutionary history of a taxon?
A. monophyletic groups B. paraphyletic groups C. polyphyletic groups D. derived groups E. All of the of the answer options are correct.
The enzyme that attaches DNA nucleotides at the ends of eukaryotic chromosomes in order to prevent chromosome shortening is called
A. Polymerase. B. Ligase. C. Telomerase. D. Topoisomerase. E. Primase.
A particular reaction has a negative delta G. However, this reaction takes many years to proceed in the absence of enzyme. Why is this the case?
A. A certain amount of activation energy is required for the reaction to proceed B. This reaction does not proceed spontaneously C. The initial free energy of the reactants is much less than the final free energy of the products D. This reaction does not obey the second law of thermodynamics
All Monerans
A. Have chlorophyll B. Lack a nucleus C. Cause disease D. Are producers