react - expose component function

You need to pass it down as a prop

   var QuestionsBox = React.createClass({
         **editQuestion**: function(questionId){               
            // do something  
            // this.refs.mainForm.loadQuestionFromServer.bind(this, questionId);
        },
        getInitialState: function() {
            return {data: []};
        },
        render: function() {
            return (
              <div className="questionsBox">
                <h4>Questions</h4>
                <QuestionsList 
                  data={this.state.data}
                  editQuestion={this.editQuestion}
                />
              </div>
            );
          }    
    });

    var QuestionsList = React.createClass({
      render: function() {

          var reactObject = this;

          var questionsList = this.props.data.map(function (question) {
            return (
              <Question>
                id={question.id} 
                editQuestion={this.props.editQuestion} 
                {question.question_name}
              </Question>
            );
          });

        return (
          <div>
            {questionsList}
          </div>
        );
      }
    });

var Question = React.createClass({
    render: function() {
        return(
            <div className="question">
                {this.props.children}
                <a id={this.props.id} onClick={this.editQuestion}>edit</a>
            </div>
        );
    },
    editQuestion: function(e) {
       this.props.editQuestion(e.target.id);
    }
});

Create a separate storage class. Embed the instance of that class in each place that has access to editing the data it contains. You see this in Flux, Facebook's architecture library. Instead of passing down handlers, have the events be emitted from the Storage class, and have each component subscribe to that instance of the storage class.

It's hard to describe, but that link has a video which will make it very clear. This way, any time data changes the store will trigger events which will trigger re-renders of your react views.