Which of the following statements about enzymes are true? Select all that apply. a)an enzyme yields a specific product, whereas a non-biological catalyst may produce more than one product, and side reactions may occur. b)reactions occur at the active sight, which usually consist of a crevice on the enzyme's surface. c)both non-biological catalysts and enzymes show reaction specificity. d)generally, an enzyme is specific for a substrate. for example, thrombin catalyzes the hydrolysis of the peptide bond between Arg and Gly.
Getting both the digene HPV Test and a Pap offers the most peace of mind for women 30 and older -- the age group that is most at risk of cervical cancer. If you do not have HPV and your Pap is normal, you can be confident you do not have abnormal cells that could develop into cervical cancer without being detected.
(Note that the most recent guidelines do not recommend HPV testing at all for girls under 20.). Repeat HPV tests. If you are over 30, how often you need to repeat the HPV test depends on your past results. For example, if both your Pap and HPV test results are normal, re-testing is needed just once every three years.Visit the section in this Web site on  What the Test Results Mean to You  for more information.Q.Note that the most recent guidelines do not recommend HPV testing at all for girls under 20.). Repeat HPV tests. If you are over 30, how often you need to repeat the HPV test depends on your past results. For example, if both your Pap and HPV test results are normal, re-testing is needed just once every three years.