Which of the following will not reduce the activation energy of a reaction?
A. addition of a catalyst that shifts Keq higher, thereby increasing product formation
B. addition of a catalyst that enables the reaction to proceed by a different mechanism
C. addition of an enzyme (catalyst) that binds to and stabilizes the transition state
D. addition of an enzyme (catalyst) that can bind to the reactants in an orientation that favors the reaction
E. addition of an enzyme (catalyst) that binds to metal ions and hydrogen ions that participate in the reaction
A
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What happens during Anaphase B?
A. Kinetochores are pulled toward the poles. B. The spindle poles move apart. C. The spindle apparatus disassembles. D. The nuclear envelope reforms. E. The APC/C gets activated for the first time.
In placental mammals, how does the fetus obtain nutrients and oxygen?
A. Maternal veins and fetal arteries are directly connected in the chorionic villi. B. Diffusion into the umbilical capillaries from maternal blood surrounding the chorionic villi. C. Maternal blood cells are carried across the fetal capillary walls through special pores. D. Maternal arteries and fetal veins are directly connected in the chorionic villi. E. Diffusion into the umbilical cord from maternal blood surrounding the chorionic villi.
In agriculture, the use of GMOs is regulated by the ____
a. FDA b. AHA c. EPA d. USDA e. NIH
The results of the treatment of 20 boys with
SCID-X1 showed that a. SCID-X1 can be cured through genetic engineering. b. most of the treated boys were cured of the disease. c. a transplanted normal IL2RG gene can cure SCID-X1. d. our understanding of the human genome lags behind our ability to modify it. e. all of these are true.