Most of the enzymes within living things are proteins. Located on the enzyme structure is an area that binds to the substance it acts upon. What is that location called?
A) substrate
B) active site
C) connection point
D) reactant location
Answer: B) active site
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A certain cell type has existed in the blood and tissue of its vertebrate host's immune system for over twenty years. One day, it recognizes a newly arrived antigen and binds to it, subsequently triggering a secondary immune response in the body
Which of the following cell types most accurately describes this cell? A) plasma cell B) thyroid cell C) memory cell D) macrophage
A dehydrated runner drinks a lot of water after a race. They rehydrate because A. the stomach is hypotonic compared to the bloodstream. B. the bloodstream is hypotonic compared to the stomach
C. the stomach and bloodstream are isotonic compared to each other. D. water will diffuse from a low to high concentration.
For an animal to move in one direction, it must exert a force in the ____________________ direction
Fill in the blank(s) with correct word
Viral hemorrhagic fevers include all of the following, EXCEPT:
A) Ebola. B) the plague. C) Rift Valley. D) yellow fever.