NEET Biology Challenge Set 1 | Willer Academy
NEET Biology MCQ Set 1
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Test Results
0%
Correct Answers: 0
Incorrect Answers: 0
Total Questions: 100
Accuracy: 0%
Time Taken: 60:00
Review Answers with Explanation
...Array.from({length: 80}, (_,i) => ({
q: `PYQ-style NEET Biology MCQ #${i+21}`,
opts: [`Option A`, `Option B`, `Option C`, `Option D`],
ans: 1,
exp: `Correct answer is Option B for question #${i+21}. This is consistent with NCERT and PYQ analysis.`
}))
];
// State Variables
let currentQ = 0;
let userAnswers = new Array(questions.length).fill(null);
let timerInterval;
let startTime;
let totalTime = 60 * 60; // 60 minutes in seconds
// DOM Elements
const accessScreen = document.getElementById('accessScreen');
const quizScreen = document.getElementById('quiz');
const resultScreen = document.getElementById('result');
const candidateNameSpan = document.getElementById('candidateName');
const accessCodeInput = document.getElementById('accessCodeInput');
const nameInput = document.getElementById('nameInput');
const accessError = document.getElementById('accessError');
const timerDisplay = document.getElementById('timer');
const progressText = document.getElementById('progressText');
const progressFill = document.getElementById('progressFill');
const timeTakenSpan = document.getElementById('timeTaken');
// Quiz Elements
const qtext = document.getElementById('qtext');
const optionsList = document.getElementById('optionsList');
const prevBtn = document.getElementById('prevBtn');
const nextBtn = document.getElementById('nextBtn');
const pagination = document.getElementById('pagination');
const submitQuizBtn = document.getElementById('submitQuiz');
const scorePercent = document.getElementById('scorePercent');
const correctCountSpan = document.getElementById('correctCount');
const incorrectCountSpan = document.getElementById('incorrectCount');
const accuracyPercent = document.getElementById('accuracyPercent');
const reviewAnswersBtn = document.getElementById('reviewAnswers');
const answerReviewDiv = document.getElementById('answerReview');
// Start Test Button Handler
document.getElementById('startBtn').addEventListener('click', () => {
const code = accessCodeInput.value.trim();
const name = nameInput.value.trim();
if (!code || !name) {
accessError.textContent = 'Please enter both access code and full name.';
return;
}
accessError.textContent = '';
candidateNameSpan.textContent = name;
accessScreen.style.display = 'none';
quizScreen.style.display = 'block';
// Start the timer
startTime = new Date();
startTimer();
renderQuestion();
renderPagination();
updateProgress();
});
// Timer function
function startTimer() {
let remaining = totalTime;
timerInterval = setInterval(() => {
remaining--;
if (remaining <= 0) {
clearInterval(timerInterval);
showResult();
return;
}
const minutes = Math.floor(remaining / 60);
const seconds = remaining % 60;
timerDisplay.textContent = `${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`;
}, 1000);
}
function stopTimer() {
clearInterval(timerInterval);
const endTime = new Date();
const timeTaken = Math.floor((endTime - startTime) / 1000);
const minutes = Math.floor(timeTaken / 60);
const seconds = timeTaken % 60;
timeTakenSpan.textContent = `${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`;
}
// Render current question
function renderQuestion() {
const q = questions[currentQ];
qtext.textContent = `Q${currentQ + 1}. ${q.q}`;
optionsList.innerHTML = q.opts.map((opt, i) => `
`).join('');
// Disable Previous button on first question
prevBtn.disabled = (currentQ === 0);
// Disable Next button on last question
nextBtn.disabled = (currentQ === questions.length-1);
// Update progress
updateProgress();
}
function updateProgress() {
const answered = userAnswers.filter(ans => ans !== null).length;
progressText.textContent = `${answered}/${questions.length}`;
const percent = (answered / questions.length) * 100;
progressFill.style.width = `${percent}%`;
}
optionsList.addEventListener('change', e => {
if (e.target.name === 'option') {
userAnswers[currentQ] = Number(e.target.value);
renderPagination();
updateProgress();
// Auto-advance to next question on mobile if not last
if (window.innerWidth <= 768 && currentQ < questions.length - 1) {
setTimeout(() => {
currentQ++;
renderQuestion();
}, 500);
}
}
});
prevBtn.addEventListener('click', () => {
if (currentQ > 0) {
currentQ--;
renderQuestion();
scrollToQuestion();
}
});
nextBtn.addEventListener('click', () => {
if (currentQ < questions.length - 1) {
currentQ++;
renderQuestion();
scrollToQuestion();
}
});
function scrollToQuestion() {
document.getElementById('questionPanel').scrollIntoView({
behavior: 'smooth',
block: 'start'
});
}
// Render pagination buttons with "answered" and "current" highlight
function renderPagination() {
pagination.innerHTML = '';
for (let i = 0; i < questions.length; i++) {
const btn = document.createElement('button');
btn.textContent = i + 1;
btn.classList.add(userAnswers[i] !== null ? 'answered' : '');
if (i === currentQ) btn.classList.add('current');
btn.addEventListener('click', () => {
currentQ = i;
renderQuestion();
scrollToQuestion();
});
pagination.appendChild(btn);
}
}
// Submit Quiz handler
submitQuizBtn.addEventListener('click', () => {
// Confirm at least one question answered
if (!userAnswers.some(ans => ans !== null)) {
alert('You have not answered any question. Please attempt at least one or confirm submission.');
if (!confirm('Submit test with zero answers?')) return;
}
stopTimer();
showResult();
});
// Calculate and display result
function showResult() {
let correct = 0, incorrect = 0;
for (let i = 0; i < questions.length; i++) {
if (userAnswers[i] !== null) {
if (userAnswers[i] === questions[i].ans) correct++;
else incorrect++;
}
}
quizScreen.style.display = 'none';
resultScreen.style.display = 'block';
const accuracy = Math.round(correct / questions.length * 100);
scorePercent.textContent = accuracy + '%';
correctCountSpan.textContent = correct;
incorrectCountSpan.textContent = incorrect;
accuracyPercent.textContent = accuracy + '%';
answerReviewDiv.innerHTML = '';
}
// Review detailed answers
reviewAnswersBtn.addEventListener('click', () => {
let html = '
Answer Review ';
for (let i = 0; i < questions.length; i++) {
const q = questions[i];
const userAns = userAnswers[i];
html += `
Q${i + 1}. ${q.q}
`;
html += '
';
for (let j = 0; j < 4; j++) {
let cls = '';
let indicator = '';
if (j === q.ans) {
cls = 'style="background:#e1f7e1; border-color:#4caf50;"';
indicator = '✓ Correct ';
} else if(j === userAns && j !== q.ans) {
cls = 'style="background:#ffebee; border-color:#f44336;"';
indicator = '✗ Your Answer ';
}
html += `${String.fromCharCode(65 + j)}. ${q.opts[j]} ${indicator} `;
}
html += ' ';
html += `
Explanation: ${q.exp}
`;
}
answerReviewDiv.innerHTML = html;
answerReviewDiv.scrollIntoView({behavior: "smooth"});
});
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