Handling array of arrays in JSON and Displaying using ng-model

Requirement: need to push an JSON array inside an array of JSON objects.Final Structure Needed like Below,

var memberArray = [{
    "Identifier": "1",
    "Question": [{
        "QuestionId": "1",
        "QuestionDetails": "Alcohol",
        "Answer": "1"
    }, {
        "QuestionId": "2",
        "QuestionDetails": "Smoking",
        "Answer": "2"
    }]
}, {
    "Identifier": "2",
    "Question": [{
        "QuestionId": "1",
        "QuestionDetails": "Alcohol",
        "Answer": "3"
    }, {
        "QuestionId": "2",
        "QuestionDetails": "Smoking",
        "Answer": "4"
    }]
}];

//I am having each member in memberArray as a single JSON object
var member = {
    "Identifier": "",
    "Question": [{
        "QuestionId": "",
        "QuestionDetails": "",
        "Answer": ""
    }, {
        "QuestionId": "",
        "QuestionDetails": "",
        "Answer": ""
    }]
};

each json values i am displaying using ng-model in the screen. I am getting the member details as the first tab output (i.e) memberArray will contain Question array as empty like below

memberArray = [{
    "Identifier": "1",
    "Question": []
}, {
    "Identifier": "2",
    "Question": []
}];
//in the next tab i am getting the question details separately for each member 
//and pushing with respect to each member like below
var Ques = [{
    "QuestionId": "",
    "QuestionDetails": "",
    "Answer": ""
}, {
    "QuestionId": "",
    "QuestionDetails": "",
    "Answer": ""
}];

for (var i in memberArray) {
    if (i.Identifier == uuid) {
        memberArray[i].Questions = angular.copy(Ques);
    }
}

uuid is the one i am passing for this function, now i am having the memberArray as expected. But ng-models i am having as similar to memberArray structure(e.g)

ng-model = memberArray[index1].Questions[index2].answer 

where index1 and index2 will be set dynamically to print all the Question details in the screen.

ISSUE

Since I am displaying the memberArray fully as a table structure. Once i am changing the first member's Question it reflecting in the second member's Questions also. Please help me with this