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Access the CBSE Class 12 Biology answer key 2024 for all sets and QP codes here. Use it to estimate your marks in the March 19 exam.
CBSE Class 12 Biology Answer Key 2024
After the CBSE Class 12 Biology exam today, March 19, 2024, students can access the answer keys for Subject Code 044. These keys will be updated for all question paper sets and QP Codes. They include solutions for Section A’s multiple-choice questions (Questions 1 to 16, 1 mark each) to help students verify their responses.
However, answers for other sections, which include descriptive answers, are not provided, as these depend on individual writing and presentation styles. The paper comprises compulsory questions with internal choices in some. Students must attempt only one alternative in such questions. Additionally, students were required to draw neat and properly labeled diagrams where necessary.
CBSE Class 12 Biology Answer Key 2024 for QP Code 57/2/1 (Set 1)
| Question Number | CBSE Biology Answer Key 2024 for QP Code 57/2/1 (Set 1) |
| 1. An angiosperm embryo sac is located within the: | (B) Megasporangium |
| 2. Match the items in Column I with those in Column II and select the correctly matched option from those given below : Column I (Cross) 1. Mendelian monohybrid 2. Mendelian dihybrid 3. Incomplete dominance 4. Test cross (monohybrid) Column II (Phenotypic Ratio) (i) 1:2:1 (F2) (ii) 1:1 (iii) 3:1 (F2) (iv) 9:3:3:1 (F2) |
(C) 1 – (iii), 2 – (iv), 3 – (i), 4 – (ii) |
| 3. In humans, the secondary oocyte completes meiotic division when : | (D) acrosomal enzymes break down the zona pellucida. |
| 4. Which one of the following statements is not true? | (D) Homologous structures are a result of convergent evolution. |
| 5. A population is in genetic equilibrium/Hardy-Weinberg equilibrium for a gene with 2 alleles (dominant allele is ‘A’ and recessive allele ‘a’). If the frequency of allele ‘A’ is 0-6, then the frequency of genotype ‘Aa’ is: | (C) 0.48 |
| 6. In the double helical structure of DNA molecule, the strands are: | (C) anti-parallel and complementary |
| 7. In a ‘transcription unit’, the ‘terminator’ is located towards the: | (D) 3′ end of the coding strand |
| 8. A woman with normal vision has a colour blind father. She marries a man with normal vision. The percentage chance of their progeny being colour blind is : | (A) 25% |
| 9. The vector for dengue fever is: | (A) Female Aedes mosquito |
| 10. Which one of the following pairs is not correctly matched ? | (C) Monascus purpureus – Citric Acid |
| 11. Which one of the following is not a feature of plasmids? | (C) Single stranded |
| 12. The pyramid of biomass in sea is generally inverted because in sea : | (A) Biomass of fishes exceeds that of phytoplankton. |
| 13. | To be updated |
| 14. | To be updated |
| 15. | To be updated |
| 16. | To be updated |
Steps to Calculate Scores using CBSE Class 12 Biology 2024 Answer Key
To accurately calculate their scores for CBSE Class 12 Biology 2024, students should use the answer key provided. Since there is no negative marking, follow these steps:
- Verify answers against the official Biology answer key.
- Count one mark for each correct response.
- Mark incorrect or un-attempted answers as 0, as there is no negative marking.
- Calculate the total score to determine the final result.
CBSE Class 12th Biology Answer Key 2024: Pattern
Students can utilize the previous year’s exam pattern and marking scheme to prepare for upcoming board exams. Additionally, upon completion of the examination, the CBSE Class 12 Biology answer key will be released, providing a detailed pattern for 2023 for students’ reference.
| Sections | Number of Questions | Marks | Type of Questions | Difficulty Level |
| Section A | 16 | 1 x 16 | Multiple Choice Questions | Moderate |
| Section B | 5 | 2 x 5 | Very Short Answer Questions | Moderate |
| Section C | 7 | 3 x 7 | Short Answer Questions | Moderate |
| Section D | 2 | 2 x 4 | Long Answer Questions | Moderate |
| Section E | 3 | 5 x 3 | Case-Based Questions | Moderate |
| Total | 33 | 70 | – | – |
More Resources for CBSE Class 12
Frequently Asked Question (FAQs)
Where I can get the Biology Class 12 Answer Key 2024?
On this page, after the exam you can find the Biology Class 12 Answer Key 2024 , verify the answer key, and match your solutions to the answers on the answer key.
When will the CBSE conduct the Biology paper for Class 12th students?
The CBSE Class 12th Biology Paper 2024 will be held on MArch 19,2024.
How many marks does the examination in Biology in CBSE Class 12th hold?
The Biology examination for CBSE Class 12th Biology holds 70 marks.
