What protein looks looks like a cork screw?

If a set of instructions that determines all of the charactersitics of an organism is comparedto a book, and a chromosme is compared to chaper in the book, then what might be compared to a paragraph in the book?

Which statement describe events that occur during interphase?

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?