All of the following are true concerning enzymes except that they
A) are proteins.
B) function as biological catalysts.
C) lower the activation energy required for a reaction.
D) affect only the rate of a chemical reaction.
E) are consumed during the reaction.
Answer: E
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By active transport a substance moves from an area of ____________________ concentration to an area of ____________________ concentration
Fill in the blank(s) with correct word
When a nonpolar molecule is placed in water, it will
A. dissociate and carry electrical current. B. carry electrical current but not dissolve or dissociate. C. neither dissolve nor carry electrical current. D. dissolve and carry electrical current.
Visual signals travel on myelinated axons. While most pain signals travel on unmyelinated axons. If you get a paper cut, will you see the cut happen or feel the pain first?
A. Both sensations will occur at the same time. B. You will feel the pain sensation before the visual sensation. C. It depends on the magnitude of the pain sensation, it may reach the brain first or second. D. You will experience the visual sensation before the pain sensation.
The symbol Na+ represents a sodium atom that has lost an electron
Indicate whether the statement is true or false