A is very rapid over long distances B requires an expenditure of energy by the cell C is a passive process in which molecules move from a region of higher concentration to a region of lower concentration D is an active process in which molecules move from a region of lower concentration to one of higher concentration E requires integral proteins in the cell membrane 4 Which of the following can be utilized as a fuel source during cellular respiration A proteins B fats polysaccharides D A and B E A B and C 5 What is the difference between covalent bonds and ionic bonds A Covalent bonds require carbon while ionic bonds do not B Covalent bonds involve the sharing of pairs of electrons between atoms ionic bonds involve the sharing of single electrons between atoms C Covalent bonds involve the sharing of electrons between atoms ionic bonds involve the electrical attraction between charged atoms D Covalent bonds involve the sharing of electrons between atoms ionic bonds involve the sharing c protons between charged atoms E Covalent bonds involve the transfer of electrons between charged atoms ionic bonds involve the sharing of electrons between atoms 2 44 45 CAD CD 46 CA CB CC 47 CA 48 A CC CD C D CE CB B B E CE C C C 99 CA 100 CA CB RESCC