There are two models of protein folding that are currently being confirmed: 1  The diffusion collision model, in which a nucleus is formed, then the secondary structure is formed, and finally these secondary structures are collided together and pack tightly together.
ATT Validity Dates. 1  Each ATT is valid for a period of time specified by the BON/RB (the average length of an ATT is 90 days). 2  Once the BON/RB has declared you eligible to test and you receive your ATT, you must test within the validity dates on the ATT.
Once your state board of nursing has verified your eligibility to take the NCLEX examination, you will receive an Authorization to Take the Test (ATT), along with a list of testing centers and instructions for how to schedule an appointment to take the examination. The cost to take the NCLEX is $200.CLEX Examination Scoring. The NCLEX examination is scored once by the computer on which you are taking it, and a second time by the National Council's testing service. It will take about a month for your state board of nursing to mail you the results of your exam.