Which of the following is/are means whereby a catalyst can lower the activation energy of a reaction?
A) decreasing the number of reactive molecules
B) altering the temperature within the cell to one appropriate for reactions to proceed
C) quantum tunneling
D) inefficient collisions
E) permanently binding substrates
Answer: C
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Localized regions of membrane lipids that contain proteins involved in cell signaling are known as
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Hormones responsible for the fight-or-flight response are produced in the ________
Fill in the blank(s) with correct word
Before contact with Europeans, a tiny, isolated group of South Pacific islands had a population of about 50,000 people. Because of poor management of their own resources, the population fell to around 5000 by about the year 1750. When Europeans finally
arrived, they brought smallpox, and after the ensuing epidemic, only about 800 islanders were left alive. The unusual genetic makeup of the native population is due to what phenomenon? A) speciation B) gene flow C) genetic drift D) bottleneck effect
If you could stop diffusion of substances in fruit fly zygotes, could you stop normal development? Why or why not?
What will be an ideal response?