The (brain/heart/liver) is the organ most severely damaged by Trypanosoma cruzi.
Fill in the blank(s) with the appropriate word(s).
heart
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Cell-mediated responses work against _____
a. intracellular pathogens b. extracellular pathogens c. cancerous cells d. both intracellular pathogens and extracellular pathogens e. both intracellular pathogens and cancerous cells f. intracellular pathogens, extracellular pathogens, and cancerous cells
Why are the laws of thermodynamics considered laws of nature and not scientific theories?
a. We do not understand how or why energy behaves the way it does. b. We understand why energy behaves the way it does, but not exactly how it behaves. c. We understand how energy behaves, but not exactly why it behaves the way it does. d. We cannot be absolutely sure that energy will behave the same under all conditions. e. We have a complete scientific explanation of energy behavior.
In science, theories tend to be ___________ than hypotheses.
A) more speculative B) less scientific C) more experimental D) broader in scope E) less reliable
One way in which an enzyme can lower the activation energy required for a reaction is to bind the substrate(s) and distort its structure so that the substrate more closely resembles the transition state of the reaction
This mechanism will be facilitated if the shape and chemical properties of the enzyme's active site are more complementary to the transition state than to the undistorted substrate; in other words, if the enzyme were to have a higher affinity for the transition state than for the substrate. Knowing this, your friend looked in an organic chemistry textbook to identify a stable chemical that closely resembles the transition state of a reaction that converts X into Y. She generated an antibody against this transition-state analog and mixed the antibody with chemical X. What do you think might happen?