When an enzyme-catalyzed reaction reaches equilibrium ____
a. the enzymes are now inhibited
b. the chemical reactions cease
c. the rate of the forward and reverse reactions are equal
d. the concentration of reactants equals the concentration of products
e. ATP is no longer required to drive the reaction
ANSWER: c
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Viruses defy characterization as living organisms even though they possess nucleic acids and proteins. The reason why viruses are not considered to be alive is because they
A. form spontaneously. B. cannot form spontaneously. C. cannot reproduce without a host cell. D. lack genetic material.
During transcription a(n) ________ can bind to a(n) ________ and increase the speed of the process
a. activator, repressor b. promoter, activator c. activator, transcription factor d. transcription factor, repressor e. activator, promoter
Which result might be a consequence of stabilizing selection?
A. There is an increase in antibiotic-resistant strains of bacteria. B. Infants born with weights between 3 and 4 kg have a higher survival than infants much lighter or heavier at birth. C. There is a decrease in the number of different breeds of dog.
The cervix is attached to the ____.
A. labium minor B. ovary C. clitoris D. oviduct E. vagina