What is true about the relative concentration of H+ and OH- in water? A. Their products always equals 10-7 B They both increase in parallel to each other C. Their product always equals 10^-14 D. They always equal each other E. They both decrease in parallel to each other What is NOT true about alcohol groups? A. Generally do not ionize to form a negative oxygen atom B. Can react with carboxylic acid to form esters C. have an -OH group attached to a carbonyl group D. have an -OH group attached to a saturated carbon atom E. Contribute very little to the polarity of a compound What is NOT true about primary protein structures? A. the core of the primary structure is a repeating three atom repeating unit B. the core unit consists of amino nitrogen, carbonyl carbon, alpha carbon C. because of steric hinderance certain amino acid sequences cannot occur D. the amino nitrogen and the carbonyl carbon come from the alpha amino and alpha carboxyl group of amino acids E. The alpha carbon can carry any one of the 20 different side chain R groups .