CBSE Class 12 Biology Answer Key 2024
CBSE Class 12 Biology Answer Key 2024: The CBSE Class 12 Board Biology exam took place today, on March 19, and went smoothly. With this exam finished, all major subjects for the Science stream are now complete. Students who took the exam were eager to know how it went. The exam was held in a single session globally with five sections labeled A to E, starting at 10:30 AM and ending at 1:30 PM, with an additional 15 minutes for students to read the paper.
Note: Some questions required students to include a diagram in their answers. Certain questions are still causing confusion among students, and they may be seeking the correct answers.
CBSE Class 12 Biology Answer Key 2024 Overview
The CBSE Class 12 Biology Exam 2024 was conducted on March 19, 2024, and students are eagerly waiting for the official question papers and answer key to be released by the Central Board of Secondary Education (CBSE). The exam lasted for 3 hours, from 10:30 a.m. to 1:30 p.m., and consisted of 33 questions divided into five sections. The paper pattern includes multiple-choice questions, short answer questions, case-based questions, and long answer questions.
Note: As of now, the official CBSE Class 12 Biology answer key 2024 has not been released.
The CBSE Class 12 Biology exam 2024 has been conducted, and students are eagerly awaiting the release of the official answer key and question papers. The exam was held for 3 hours in pen and paper mode, and the question paper had 33 questions overall, divided into 5 sections.
-
Section A had 16 questions of 1 mark each, Section B had 5 questions of 2 mark each, Section C had 7 questions of 3 marks each, Section D had 2 case-based questions of 4 marks each, and Section E had 3 questions of 5 marks each.
|
Exam Details |
CBSE Class 12 Biology Exam 2024 |
|
Date of Exam |
March 19, 2024 |
|
Exam Duration |
3 hours (10:30 a.m. to 1:30 p.m.) |
|
Total Questions |
33 |
|
Sections |
5 |
|
Types of Questions |
|
|
Section-wise Distribution |
Section A: 16 questions of 1 mark each Section B: 5 questions of 2 marks each Section C: 7 questions of 3 marks each Section D: 2 case-based questions of 4 marks each Section E: 3 questions of 5 marks each |
|
Status of Answer Key |
Not released yet |
CBSE Class 12 Biology 2024 Question Paper PDF
The CBSE Class 12 Biology paper was fair and presented questions in a clear format familiar to students. It consisted of 33 questions, each offering internal choices, to be completed within a 3-hour timeframe. The paper is graded out of 70 marks, with an additional 30 marks allotted for practical assessment. Below is the format of the CBSE Class 12 Biology paper for the year 2024:
|
CBSE Class 12 Biology 2024 Question Paper PDF |
||
|
Section |
No. of Questions |
Marks |
|
Section A |
16 |
16 x 1 = 16 |
|
Section B |
5 |
5 x 2 = 10 |
|
Section C |
7 |
7 X 3 = 21 |
|
Section D |
2 Case Studies |
2 x 4 = 8 |
|
Section E |
3 |
3 x 5 = 15 |
|
Total |
33 |
70 |
CBSE Class 12 Biology Answer Key 2024
As of now, the official CBSE website has not yet released the CBSE Class 12 Biology question papers and answer key for 2024. However, students can access the provisional answer key designed by our PW gulf Biology experts to help them assess their performance.
This provisional answer key includes the solutions for Section A's multiple-choice questions (Questions 1 to 16, 1 mark each) to help students verify their responses.
CBSE Class 12 Biology Answer Key 2024 SET 1 for 57/2/2
Here is the required CBSE Class 12 Biology Answer Key 2024 SET 1 MCQs, listed below:
|
CBSE Class 12 Biology Answer Key 2024 SET 2 |
|
|
Question Number |
Correct Answers |
|
1. |
(B) Megasporangium |
|
2. |
(C) 1-(iii), 2-(iv), 3-(ⅰ), 4-(ii) |
|
3. |
(D) acrosomal enzymes break down the zona pellucida |
|
4. |
(D) Homologous structures are a result of convergent evolution |
|
5. |
(C) 0.48 |
|
6. |
(C) anti-parallel and complementary |
|
7. |
(D) 3′ end of the coding strand |
|
8. |
(A) 25% |
|
9. |
(A) Female Aedes mosquito |
|
10. |
(c) |
|
11. |
(C) Single stranded |
|
12. |
(A) Biomass of fishes exceeds that of phytoplankton |
|
13. |
(a) |
|
14. |
(a) |
|
15. |
(c) |
|
16. |
(D) |
CBSE Class 12 Biology Answer Key 2024 SET 2 for 57/2/2
Here is the required CBSE Class 12 Biology Answer Key 2024 SET 2 MCQs, listed below:
|
Question Number |
CBSE Biology Answer Key 2024 for QP Code 57/2/2 (Set 2) |
|
1. |
(B) Divergent Evolution |
|
2. |
(C) 0.48 |
|
3. |
(C) anti-parallel and complementary |
|
4. |
(D) 3' end of the coding strand |
|
5. |
(D) |
|
6. |
(A) Female Aedes mosquito |
|
7. |
(C) Monascus purpureus - Citric Acid |
|
8. |
(A) Biomass of fishes exceeds that of phytoplankton. |
|
9. |
(A) Restriction endonuclease |
|
10. |
(D) acrosomal enzymes break down the zona pellucida. |
|
11. |
(C) 1 - (iii), 2 - (iv), 3 - (i), 4 - (ii) |
|
12. |
(A) Embryo sac |
|
13. |
(B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A). |
|
14. |
(D) Assertion (A) is false, but Reason (R) is true. |
|
15. |
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). |
|
16. |
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). |
CBSE Class 12 Biology Answer Key 2024 for QP Code 57/3/2 (Set 2)
Section A contains 16 multiple-choice questions, each worth 1 mark. The answers for Set 2 (Code 57/3/2) are presented in a table below.
|
Question Number |
CBSE Biology Answer Key 2024 for QP Code 57/3/2 (Set 2) |
|
1. |
(B) 2n, n |
|
2. |
(D) (i) and (ii) |
|
3. |
(D) 2020 |
|
4. |
(A) Asteraceae |
|
5. |
(B) Killed yeast |
|
6. |
(A) Less in number |
|
7. |
(D) 25% Red : 50% Pink : 25% White |
|
8. |
(B) Turner's syndrome |
|
9. |
To be updated |
|
10. |
(C) Escherichia coli |
|
11. |
(C) |
|
12. |
(D). Pneumonia |
|
13. |
To be updated |
|
14. |
(D) Assertion (A) is false, but Reason (R) is true. |
|
15. |
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). |
|
16. |
(B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A). |
CBSE Class 12 Biology Answer Key 2024 for QP Code 57/4/2 (Set 2)
Here is the required table for CBSE Class 12 Biology Answer Key 2024 for QP Code 57/4/2 (Set 2) MCQs, listed below:
|
Question Number |
CBSE Biology Answer Key 2024 for QP Code 57/4/2 (Set 2) |
|
1. |
(A) antipodal, zygote and endosperm |
|
2. |
(A) Aneuploidy |
|
3. |
(D) P - Transcription, Q - mRNA, R - Translation |
|
4. |
(A) A - Connective, B - Endothecium, C - Pollen grain. |
|
5. |
(D) Ovum - B, Morula - D, Blastocyst - G |
|
6. |
(C) A - III, B - I, C - IV, D - II |
|
7. |
(A) X-Linked recessive |
|
8. |
(B) antigen-antibody interaction |
|
9. |
(B) Divergent evolution |
|
10. |
(D) Restriction enzymes |
|
11. |
(D) Y-chromosome |
|
12. |
(D) A - (ii), B - (iv), C - (i), D - (iii) |
|
13. |
(C) Assertion (A) is true, but Reason (R) is false. |
|
14. |
(B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A). |
|
15. |
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). |
|
16. |
(C) Assertion (A) is true, but Reason (R) is false. |
CBSE Class 12 Biology Answer Key 2024 for QP Code 57/5/1 (Set 1)
Here is the required table for CBSE Class 12 Biology Answer Key 2024 for QP Code 57/5/1 (Set 1), listed below:
|
Question Number |
CBSE Biology Answer Key 2024 for QP Code 57/5/1 (Set 1) |
|
1. |
(D) Pleiotropism |
|
2. |
(B) 2n, n |
|
5. |
(C) ICSI |
|
10. |
(D) Virus infected cell |
|
8. |
(B) flocs |
|
9. |
(D) Ethidium bromide stained DNA can be seen under UV light. |
|
7. |
(A) Pseudocopulation |
|
11. |
(B) A - degenerating synergids, B - zygote, C - PEN, D - degenerating antipodals |
|
12. |
(D) Autosomal recessive |
|
6. |
(C) a - (iii), b - (i), c - (iv), d - (ii) |
|
14. |
(A) 25% |
|
1. |
(A) 5' - AUGAAUG - 5' |
|
16. |
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). |
|
15. |
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). |
|
13. |
(D) Assertion (A) is false, but Reason (R) is true. |
CBSE Class 12 Biology Answer Key 2024 for QP Code 57/5/2 (Set 2)
Here is the required table for CBSE Class 12 Biology Answer Key 2024 for QP Code 57/5/2 (Set 2), listed below:
|
Question Number |
CBSE Biology Answer Key 2024 for QP Code 57/5/2 (Set 2) |
|
1. |
(A) 5' - AUGAAUG - 5' |
|
2. |
(A) 4000 |
|
3. |
(D) (i) and (ii) |
|
4. |
(B) Saltation |
|
5. |
(C) ICSI |
|
6. |
(C) a - (iii), b - (i), c - (iv), d - (ii) |
|
7. |
(D) Chitinase |
|
8. |
(B) flocs |
|
9. |
(B) amorphous, colloidal, light coloured substance |
|
10. |
(D) Virus infected cell |
|
11. |
(B) A - degenerating synergids, B - zygote, C - PEN, D - degenerating antipodals |
|
12. |
(D) Autosomal recessive |
|
13. |
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). |
|
14. |
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). |
|
15. |
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). |
|
16. |
(To be updated) |
Class 12 Biology Paper Analysis 2024
The CBSE Class 12 Biology Paper 2024 had 33 questions across five sections, covering various question types without any choices provided. Students found the paper moderately challenging and slightly lengthy, though it was based on expected content within the syllabus. Overall feedback from students was positive, with most questions directly from the NCERT textbooks. However, some questions were tricky, they generally tested application and analysis skills.
|
Class 12 Biology Paper Analysis 2024 |
|
|
Section |
Difficulty Level |
|
Overall |
Easy to Moderate to Tough |
|
Section A |
Easy |
|
Section B |
Easy to Moderate |
|
Section C |
Moderate |
|
Section D |
Moderate |
|
Section E |
Moderate |
CBSE Class 12 Biology Answer Key 2024 FAQs
Q1: Where can I find the CBSE Class 12 Biology Answer Key 2024?
Ans: The CBSE Class 12 Biology Answer Key 2024 can be found on various educational websites and platforms, like PW Gulf.
Q2: When was the CBSE Class 12 Biology Exam 2024 conducted?
Ans: The CBSE Class 12 Biology Exam 2024 was conducted on March 19, 2024.
Q3: How many sections were there in the CBSE Class 12 Biology Paper 2024?
Ans: The CBSE Class 12 Biology Paper 2024 consisted of five sections named A to E, with a total of 33 questions, including MCQs, short and long-answer type questions, case study-based questions, and assertion-reason questions.
Q4: What is the total marking scheme for the CBSE Class 12 Biology Exam 2024?
Ans: The CBSE Class 12 Biology Exam 2024 was evaluated out of 70 marks for theory and 30 marks for practicals, totaling 100 marks.
Q5: How can students calculate their scores using the CBSE Class 12 Biology Answer Key 2024?
Ans: To calculate scores, students should verify their answers against the official answer key, assign one mark for each correct response, mark incorrect or un-attempted answers as 0 (no negative marking), and then calculate the total score to determine their result.
