Science (English Medium)
Academic Year: 2025-2026
Date & Time: 27th March 2026, 10:30 am
Duration: 3h
Advertisements
Note:
- Please check that this question paper contains 23 printed pages.
- Q.P. Code given on the right hand side of the question paper should be written on the title page of the answer-book by the candidate.
- Please check that this question paper contains 33 questions.
- Please write down the serial number of the question in the answer-book at the given place before attempting it.
- 15 minute time has been allotted to read this question paper. The question paper will be distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the candidates will read the question paper only and will not write any answer on the answer-book during this period.
General Instructions:
Read the following instructions carefully and follow them:
- This question paper contains 33 questions. All questions are compulsory.
- Question paper is divided into FIVE sections - Section A, B, C, D and E.
- Section A - questions number 1 to 16 are multiple choice type questions. Each question carries 1 mark.
- Section B - questions number 17 to 21 are very short answer type questions. Each question carries 2 marks.
- Section C - questions number 22 to 28 are short answer type questions. Each question carries 3 marks.
- Section D - questions number 29 and 30 are case-based questions. Each question carries 4 marks. Each question has subparts with internal choice in one of the subparts.
- Section E - questions number 31 to 33 are long answer type questions. Each question carries 5 marks.
- There is no overall choice. However, internal choices have been provided in some questions. A candidate has to write answer for only one of the alternatives in such questions.
- Kindly note that there is a separate question paper for Visually Impaired candidates.
- Wherever necessary, neat and properly labelled diagrams should be drawn.
Perisperm present in seed of black pepper is remnant of ______.
Ovary
Nucellus
Anther
Megaspore
Chapter:
Interferons are most effective in making non-infected cells resistant against the spread of which of the following diseases?
Malaria
Ascariasis
Pneumonia
Cancer
Chapter:
Which of the following sacred groves is found in Meghalaya?
Jaintia hills
Bastar
Chanda
Sarguja
Chapter:
In an ecosystem, different species occupy different levels and vertical distribution of species is found. This is called ______.
Stratification
Layering
Fragmentation
Population
Chapter:
Which of the following statements about plasmids is incorrect?
Plasmids have the ability to replicate within the bacterial cell.
Their replication is controlled by chromosomal DNA.
They are autonomously replicating circular extra-chromosomal DNA.
They often carry antibiotic resistant genes.
Chapter:
Which connective tissue connects ovary to pelvic wall and uterus?
Tendons
Ligaments
Cartilage
Bone
Chapter:
Select the option that shows correct statements:
- Corpus luteum secretes progesterone.
- Only FSH attains a peak level in middle of cycle.
- LH surge induces rupture of graafian follicle.
- Luteal phase of menstrual cycle is also called proliferative phase.
Only (ii) is correct.
(i) and (iii) are correct.
Only (iv) is correct.
(ii) and (iv) are correct.
Chapter:
Which one of the following evidences does not support Darwin’s theory of natural selection?
Branching Descent
Small & directional variations
Appearance of new traits by mutations
Survival of the fittest
Chapter:
Advertisements
Expression of a particular gene helps to identify transformants. What is this gene known as?
Plasmid
Structural gene
Selectable marker
Intron
Chapter:
A DNA molecule is 140 base pairs long. It has 20% thymine. How many guanine bases are present in the molecule?
64
84
32
56
Chapter:
Select the mismatched pair:
Mega diversity countries in the world - 12
Genetically different strains of rice in India - Less than 1000
Robert Mays estimation on global species diversity - 7 million species worldwide
Zoological parks - Ex-situ conservation
Chapter:
Pomato was produced by fusing protoplasts of ______.
Tomato and Potato
Pomegranate and Tomato
Pomegranate and Potato
Pomegranate, Potato and Tomato
Chapter:
Assertion (A): Fossils provide direct evidence for evolution.
Reason (R): Fossils help to trace evolutionary relationships among organisms over time.
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation for Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation for Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.
Chapter:
Assertion (A): In terrestrial ecosystem much larger fraction of energy flows through grazing food chain.
Reason (R): Grazing food chain may be connected to Detritus food chain at some levels.
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation for Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation for Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.
Chapter:
Assertion (A): The milk produced by transgenic cow Rosie’ was nutritionally more balanced product for human babies than natural cow milk.
Reason (R): It was human protein enriched milk containing human alpha lactaglobulin.
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation for Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation for Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.
Chapter:
Assertion (A): Flocs are masses of bacteria associated with fungal filaments in secondary treatment of sewage.
Reason (R): Flocs help in digestion of solid waste by anaerobic respiration.
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation for Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation for Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.
Chapter:
Advertisements
A health officer visiting two different regions reported the following symptoms in patients:
Region A: Sustained high fever with-stomach pain, constipation and loss of appetite.
Region B: Inflammation in the lower limbs and genital organs.
Name the diseases likely affecting the patients in regions A and B. Write the scientific name of the causative organisms in both the cases.
Chapter:
How does a farmer use dormancy of seed to his advantage?
Chapter:
Differentiate between pea seed and castor seed.
Chapter:
Identify the stage of follicle where primary oocyte undergoes first meiotic division.
Also mention the products of this division.
Chapter:
What is the major advantage of producing plants by micropropagation?
Chapter:
Mendel published his work on inheritance in 1865, but it remained unnoticed for over three decades.
State the reasons why his work was not recognised during his life time.
Chapter:
Other Solutions
Submit Question Paper
Help us maintain new question papers on Shaalaa.com, so we can continue to help studentsonly jpg, png and pdf files
CBSE previous year question papers Class 12 Biology with solutions 2025 - 2026
Previous year Question paper for CBSE Class 12 -2026 is solved by experts. Solved question papers gives you the chance to check yourself after your mock test.
By referring the question paper Solutions for Biology, you can scale your preparation level and work on your weak areas. It will also help the candidates in developing the time-management skills. Practice makes perfect, and there is no better way to practice than to attempt previous year question paper solutions of CBSE Class 12.
How CBSE Class 12 Question Paper solutions Help Students ?
• Question paper solutions for Biology will helps students to prepare for exam.
• Question paper with answer will boost students confidence in exam time and also give you an idea About the important questions and topics to be prepared for the board exam.
• For finding solution of question papers no need to refer so multiple sources like textbook or guides.
