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. This reaction does not obey the second law of thermodynamics
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. A certain amount of activation energy is required for the reaction to proceed
D. A certain amount of activation energy is required for the reaction to proceed
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During elongation, the polypeptide is removed from the tRNA in the P site and transferred to the amino acid in the A site
Indicate whether the statement is true or false
Transcription of the lac operon is most efficient when ____
a. cAMP levels are low b. the CAP site of the promoter is not bound to cAMP c. glucose is present and lactose is absent d. lactose is present and glucose is absent e. lactose and glucose are present
Once the stored ATP is consumed, what
substance will muscles turn to for energy?
a. glucose b. lactate c. sugar d. creatine phosphate e. myoglobin
The shape of a virus is determined by
its DNA. its RNA. its envelope. its host. its coat protein organization