Read and download the CBSE Class 12 Biology 2025 Sample Paper Solved Set 7, designed by expert teachers according to the latest 2025-26 curriculum and examination pattern issued by CBSE, NCERT, and KVS. These Class 12 Biology sample papers include detailed step-by-step solutions, helping students to practice and evaluate their performance against the most recent marking schemes.
Solved Sample Paper for Class 12 Biology PDF
Our Class 12 Biology model papers are important for understanding the weightage of different chapters and the difficulty level of expected questions. By solving these guess papers Class 12 students can identify weak areas and improve time management. We also suggest referring to our Class 12 Biology Question Papers of previous years to further strengthen your exam preparation.
Class 12 Biology Sample Paper with Solutions
Section – A
Q. No. 1 to 12 are multiple choice questions. Only one of the choices is correct. Select and write the correct choice as well as the answer to these questions.
1 During apomictic seed formation, there is no reduction division and the gametes (both egg cell and the pollen) are diploid.
What is the ploidy of the endosperm formed through apomixis?
A. 2n
B. 3n
C. 4n
D. 6n
Answer : d
2 Which of the following statements describes the difference between placenta and umbilical cord?
A. The placenta secretes hormones whereas the umbilical cord does not.
B. The placenta persists after pregnancy while the umbilical cord is expelled.
C. The placenta is lined with veins and arteries while the umbilical cord is not.
D. The placenta interlocks with foetal tissues whereas the umbilical cord interlocks with the uterine tissue.
Answer : a
3 Billions of years ago, when Earth had a reducing atmosphere containing methane and ammonia along with high temperatures, the organisms that came to existence would have been -
A. aerobic and chemo-autotrophic
B. anaerobic and chemo-heterotrophic
C. aerobic and chemo-heterotrophic
D. anaerobic and chemo-autotrophic
Answer : b
4 Which of the following phenomena significantly contributes to speciation?
P) Natural Selection
Q) Genetic Drift
R) Gene flow
S) Geographic Isolation
T) Stabilizing Selection
A. only Q and S
B. only R and T
C. only P, Q and S
D. only Q, R and T
Answer : c
5 A sample of normal double-stranded DNA was found to have thymine content of 27%. What will be the expected proportion of guanine in thisstrand?
A. 23%
B. 32%
C. 36%
D. 73%
Answer : a
6 If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is
(A) autosomal dominant
(B) autosomal recessive
(C) sex-linked dominant
(D) sex-linked recessive
Answer : d
Please click the link below to download pdf file of CBSE Class 12 Biology 2025 Sample Paper Solved Set 7
| CBSE Class 12 Biology Boards 2020 Sample Paper Solved |
| CBSE Class 12 Biology Sample Paper 2020 Solved Set A |
| CBSE Class 12 Biology Sample Paper 2020 Solved Set B |
| CBSE Class 12 Biology Sample Paper 2019 Solved |
| CBSE Class 12 Biology Sample Paper 2019 Solved Set A |
| CBSE Class 12 Biology Sample Papers 2011 Set A |
| CBSE Class 12 Biology Sample Papers 2011 Set B |
| CBSE Class 12 Biology Sample Papers 2011 Set C |
| CBSE Class 12 Biology Sample Papers 2011 Set D |
| CBSE Class 12 Biology Sample Paper 2010 Set A |
| CBSE Class 12 Biology Sample Paper 2010 Set B |
| CBSE Class 12 Biology Sample Paper 2010 Solved Set C |
| CBSE Class 12 Biology Sample Paper 2010 Solved Set D |
| CBSE Class 12 Biology Blue print |
| CBSE Class 12 Biology Sample Paper Set A |
Important Practice Resources for Class 12 Biology
How to download CBSE Class 12 Biology 2025 Sample Paper Solved Set 7 in PDF?
Students can easily download the CBSE Class 12 Biology 2025 Sample Paper Solved Set 7 from our website to prepare for their upcoming examinations. To score high marks, it is important for Class 12 students to understand the exaact pattern as per which teachers design the question papers. We strongly suggest that you practice these latest sample papers for Biology and solve different types of questions that are expected to come this year. You can downloadin PDF format so that you can practice offline. We also recommend that Class 12 students solve these papers actual exam conditions at home.
Why should you solve CBSE Class 12 Biology 2025 Sample Paper Solved Set 7?
Practicing these model papers has several benefits for Class 12 students:
- New Question Bank: This set has fresh questions for Biology which are different from previous years.
- Exam Pattern Knowledge: Solving more sets will help you to understand the weightage of each chapter in Class 12 and also the type of questions asked.
- Identify Weak Areas: Comparing your score in each set to find out topics in Class 12 Biology for which you need hard work.
- Speed and Accuracy: Attempting MCQ questions and long-form problems for Class 12 Biology makes you faster and better and you will be able to finish your exam on time.
What should you do after solving CBSE Class 12 Biology 2025 Sample Paper Solved Set 7?
- Check Your Work: Match your answers with the solutions given by our teachers in the Biology Sample Paper PDF.
- Learn from Mistakes: Class 12 students should focus on the questions which you solved incorrectly and understand the error.
- Revision: If you find a question difficult you shoul refer to NCERT book for Class 12 Biology to understand concepts and then try the question again.
- Continuous Practice: Solve multiple sets of Biology sample papers from studiestoday.com to build confidence before the CBSE exams.
You can download the complete PDF for CBSE Class 12 Biology 2025 Sample Paper Solved Set 7 for free from StudiesToday.com. Our resources for Class 12 Biology are updated for the latest academic session and follow the official exam pattern.
Yes, CBSE Class 12 Biology 2025 Sample Paper Solved Set 7 comes with detailed, teacher-verified solutions. We have provided step-by-step answers for Biology to help students of Class 12 understand correct methodology and marking scheme.
Practicing this Biology paper helps in time management and identifying important topics. For Class 12, solving mock papers is the best way to gain confidence and reduce exam-day anxiety.
Yes, all our study materials for Class 12 Biology are provided in a mobile-friendly PDF format. You can easily download CBSE Class 12 Biology 2025 Sample Paper Solved Set 7 on your mobile device.