Do you have an Atkins book???? All the questions you ask clearly indicates that you really must read the book. The book provides chapters and chapters of info.

Ketosis is when fat is used for energy after the energy fro m carbs is used first. If weight loss is your goal, then eat a bit less fat and use adipose tissue for the energy. As you close in on goal weight you can increase the fat until weight plateaus= IF you want to maintain ketosis for life. This is the keto diet.


For Atkins,
Simply keep adding small portions of ALLOWABLE foods with carbs until you stop losing weight.

Bananas and rice cakes are not on the lists that I have seen.

Atkins has a different proportion of the macros ( protein, fat, carbs) than "keto" diet.