(define my-list '(1 2 3))
my-list ⇒ (1 2 3)
(set-car! my-list 'foo)
my-list => ⇒ (foo 2 3)
(set-cdr! my-list '(bar baz))
my-list => ⇒ (foo bar baz)
So an implementation of linked nodes in Scheme:
(define make-node cons)
(define node-element car)
(define node-rest cdr)
(define node-set-element! set-car!)
(define node-set-rest! set-cdr!)