Site MapHelpFeedbackPre Test Quiz
Pre Test Quiz
(See related pages)

1
We know that living things, even individual cells, require materials and energy to survive. Materials must enter and wastes exit cells. How is this process regulated?
A)A cell’s cell wall regulates the passage of molecules in and out of the cell.
B)A cell’s size determines what will fit in and what must be sent out.
C)A cell’s capsule regulates the passage of molecules in and out of the cell.
D)A cell’s plasma membrane regulates the passage of molecules in and out of the cell.
2
A molecule passively moves from a high concentration to a low concentration, following its concentration gradient, until it is distributed equally and the gradient disappears. This process is called
A)diffusion.
B)facilitated diffusion.
C)bulk transport.
D)active transport.
3
Energy in action is __________. Stored energy is __________.
A)potential energy; the capacity to do work
B)potential energy; kinetic energy
C)the capacity to do work; kinetic energy
D)kinetic energy; potential energy
4
An enzyme is usually a protein that functions as a catalyst. This means that enzymes
A)speed chemical reactions through their breakdown during the reaction.
B)speed chemical reactions without being affected by the reaction.
C)increase the energy of activation needed for a reaction to proceed.
D)are converted to substrate during a reaction.
5
Why is a molecule of ATP well-suited to serve as an energy donor and not an energy storage molecule?
A)ATP contains energy in its H-C bonds, whereas an energy storage molecule contains its energy in P-P bonds.
B)ATP is a stable molecule that is difficult to break down. An energy storage molecule is unstable, so that harvesting the energy is relatively easy.
C)ATP is an unstable molecule that readily breaks down at its P-P bonds to release energy. An energy storage molecule is stable, storing energy in its many H-C bonds.
D)ATP is an unstable molecule that readily breaks down at its C-H bonds to release energy. An energy storage molecule is stable, storing energy in its many P-P bonds.





To learn more about the book this website supports, please visit its Information Center.
Copyright (c)2014 McGraw-Hill Education .
Any use is subject to the Terms of Use and Privacy Notice | Report Piracy


Concepts of BiologyOnline Learning Center

Home > Chapter 5 > Pre Test Quiz