how to pass result 'repeat'-'h:selectOneRadio' to List on Backing bean,using Ajax

how to pass the result of - in List on Backing bean, using Ajax?

<h:form rendered="#{lessonBean.TEST!=null}">
      <ui:repeat value="#{lessonBean.TEST.questions}" var="quest">
             <h:selectOneRadio value="">
                     <f:selectItem itemValue="1" itemLabel="${quest.a1}"/>
                     <f:selectItem itemValue="2" itemLabel="${quest.a2}"/>
                     <f:selectItem itemValue="3" itemLabel="${quest.a3}"/>
                     <f:selectItem itemValue="4" itemLabel="${quest.a4}"/>
                     <f:selectItem itemValue="5" itemLabel="${quest.a5}"/>
            </h:selectOneRadio>
      </ui:repeat>
</h:form>

it's xhtml file