Primary ciliary dyskinesia is a disorder characterized by chronic respiratory tract infections, abnormally positioned internal organs, and the inability to have children (infertility). The signs and symptoms of this condition are caused by abnormal cilia and flagella.
Apart from the writing sections, all the five sections contain a total of 48 questions. Out of these 48 questions, 40 contribute towards the score in PCAT, while the remaining 8 questions are experimental questions that are not scored. Out of the two writing sections, one section is for experimentation.
The SAT is the real test. The PSAT (preliminary scholastic aptitude test) is like a practice test but its score is important. It indicates how well you are prepared for the SAT and where you need more study. Many students take the PSAT more than once. If so you need to inquire if your official score is the last one or the highest one.