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.
Or, if you can't answer the easy ones correctly, then you won't be able to answer the difficult ones. In fact, the computer often could make a decision after less than the minimum of 60 questions, but 60 is necessary to ensure coverage of the NCLEX Test Plan.