Biology · Class 12 Science

Tripura Tbse Class 12 Biology — Real Previous-Year Papers

with complete answers

Real previous-year board papers, year by year — the official exam pattern, the full question paper, and every question solved the concept-first way. Distinct from the chapter-wise textbook bank.

2023–2026
Years of papers: 3
Total Papers: 3
Real Board Papers: 0
Sample papers: 117
Real-paper Q & A: 0
Sample-paper Q & A

Real board-paper questions available, by year

37 Q2026complete

37 Q2025complete

—2024Paper not yet available

43 Q2023complete

—2022Paper not yet available

—2021Exam cancelled (COVID-19)

2024 — Paper not yet available: This year’s exam was held, but no verified question paper for this subject has been published by any source we check — the official TBSE site and the public past-paper archives. We publish only a paper we can verify against a real printed original — this one will appear here once it is.

2022 — Paper not yet available: This year’s exam was held, but no verified question paper for this subject has been published by any source we check — the official TBSE site and the public past-paper archives. We publish only a paper we can verify against a real printed original — this one will appear here once it is.

2021 — Exam cancelled (COVID-19): TBSE cancelled the Class-12 Higher Secondary (+2 Stage) examination in 2021 due to COVID-19; no annual question paper was conducted or printed that year, so none exists to publish. Results were declared using an expert-committee evaluation formula.

Higher Secondary (+2 Stage) Examination 2026 · Set ANNUAL

Real board examination

About this paper

The real Class-12 board examination held in 2026. Every question below is solved the concept-first way. Sample papers are labelled honestly — never shown as a past exam.

Total marks: 70
Questions: 37
Duration: 195 min
Sections: 6

The marks / questions / duration above are the official exam pattern. We currently have 37 of this paper’s questions (100% of the full paper), with 37 fully solved. Questions we couldn’t yet extract or verify are held — never shown as complete.

Sections & marks

Section	Type	Questions	Marks each	Total
ASection A	mcq	10	1	10
BSection B	very_short	10	1	10
CSection C	short	8	2	16
DSection D	short	4	3	12
ESection E	long	3	4	12
FSection F	long	2	5	10
Total		37		70

The question paper

The questions we hold for this paper, laid out by section. Solutions are on the Answers tab.

Board Examination

Biology

Higher Secondary (+2 Stage) Examination 2026 · Set ANNUAL

Series/Set: ANNUALRoll No. ________

Time Allowed: 3 hr 15 minMaximum Marks: 70

General Instructions

This question paper contains 37 questions divided into 6 sections — A, B, C, D, E, F.
Section A comprises 10 questions of 1 mark each (mcq).
Section B comprises 10 questions of 1 mark each (very_short).
Section C comprises 8 questions of 2 marks each (short).
Section D comprises 4 questions of 3 marks each (short).
Section E comprises 3 questions of 4 marks each (long).
Section F comprises 2 questions of 5 marks each (long).

Above is the official exam pattern. The questions printed below are those we currently hold for this paper.

Section A

mcq · 1 mark each · 10 of 10 shown

Q1.

Which of the following microorganisms is capable of producing the immunosuppressive molecule Cyclosporin-A?

(a) Trichoderma polysporum
(b) Clostridium butylicum
(c) Aspergillus niger
(d) Streptococcus cerevisiae

[1]

Q2.

Which of the following is commercialized as a substance that reduces the amount of cholesterol in the blood?

(a) Statin
(b) Streptokinase
(c) Lipase
(d) Protease

[1]

Q3.

The first restriction endonuclease enzyme to be discovered is —

(a) Ava I
(b) Hind III
(c) ECo RI
(d) Hind II

[1]

Q4.

Genetically modified Bt brinjal has been developed in our country —

(a) as drought-resistant
(b) as insect-resistant
(c) to remain fresh/alive for a longer time
(d) as a carrier of abundant mineral substances

[1]

Q5.

Which of the following is NOT a biodiversity hotspot of India?

(a) Western Ghats
(b) Indo-Burma
(c) Aravalli mountains
(d) Himalayan region

[1]

Q6.

Due to the presence of which of the following substances is a pollen grain preserved as a fossil?

(a) Sporopollenin
(b) Cellulose
(c) Pectin
(d) Hemicellulose

[1]

Page 1 of 6

Q7.

Contraceptive pills control birth/fertility by — (a) destroying sperm (b) destroying the ovum (c) blocking the release of the ovum (ovulation) (d) creating a barrier between sperm and ovum

[1]

Q8.

Which is an autosomal linked recessive disease? (a) Haemophilia (b) Sickle cell anaemia (c) Colour blindness (d) None of these

[1]

Q9.

The discoverers of semi-conservative replication of the DNA molecule are — (a) Pasteur and Jenner (b) Meselson and Stahl (c) Krebs and Khorana (d) Harvey and Berg

[1]

Q10.

Which is the 'Java Man'? (a) Homo habilis (b) Australopithecus (c) Homo sapiens (d) Homo erectus

[1]

Section B

very_short · 1 mark each · 10 of 10 shown

Q1.

What is sewage?

[1]

Q2.

Write the names of two methods used for disease diagnosis at the molecular level.

[1]

Q3.

Golden rice is enriched with which vitamin?

[1]

Q4.

What is commensalism? Give an example.

[1]

Q5.

Write the full form of IUCN.

[1]

Q6.

What is the process called by which an immature sperm develops into a mature sperm?

[1]

Page 2 of 6

Q7.

What is emasculation?

[1]

Q8.

What is point mutation? Give an example.

[1]

Q9.

By which method is the age of a fossil determined?

[1]

Q10.

Write the scientific name of the parasite that causes malignant malaria.

[1]

Section C

short · 2 marks each · 8 of 8 shown

Q1.

What is Recombinant DNA? Mention its necessity in biotechnology.

[2]

Q2.

What is biopiracy? Give one illustrative example of biopiracy.

[2]

Q3.

What is decomposition? Write the role of decomposition in an ecosystem.

[2]

Q4.

Mention two methods of biodiversity conservation. What is an endangered species?

[2]

Q5.

Write two differences between homologous organs and analogous organs.

[2]

Page 3 of 6

Q6.

Write the equation of the Hardy-Weinberg principle. Write the names of two factors that affect the Hardy-Weinberg equilibrium.

[2]

Q7.

Write the name of the parasite that causes dysentery. Mention two symptoms of this disease.

[2]

Q8.

What is biogas? Write the name of the microorganism that produces biogas.

[2]

Section D

short · 3 marks each · 4 of 4 shown

Q1.

Write the name of one non-steroidal contraceptive pill. What is called lactational amenorrhea?

[3]

Q2.

A. Match the following: (i) Mutualism (ii) Parasitism (iii) Competition (iv) Amensalism — with: (a) Both species are harmed (b) One is benefited, the other neither gains nor loses (c) Both species are benefited (d) One is benefited, the other is harmed. B. Write the equation of logistic growth.

[3]

Q3.

What is the cause of Down syndrome? Write the symptoms of this syndrome.

[3]

Q4.

What is the Human Genome Project? Write two objectives of this project.

[3]

Page 4 of 6

Section E

long · 4 marks each · 3 of 3 shown

Q1.

What is Polymerase Chain Reaction (PCR)? Briefly write the three steps of this reaction. **OR** Write the necessity of the following in biotechnology: (i) Vector (ii) Restriction endonuclease (iii) Bioreactor (iv) DNA ligase

[4]

Q2.

(i) What is called an antibody? (ii) Briefly describe, with the help of a diagram, the structure of an antibody molecule. **OR** (i) What is interferon? (ii) Write two differences between active and passive immunity. (iii) Write the name of one autoimmune disease.

[4]

Q3.

What is double fertilization? Briefly describe, with the help of a diagram, the process of double fertilization in angiosperms.

[4]

Section F

long · 5 marks each · 2 of 2 shown

Q1.

(i) What is oogenesis? (ii) Briefly describe the process of oogenesis. (iii) Write the names of two hormones that assist in oogenesis. **OR** (i) What is the placenta? Why is it called an endocrine gland? (ii) Mention two functions of the placenta. (iii) What is called chorionic villi?

[5]

Page 5 of 6

Q2.

Describe, with the help of a diagram, the experiment of scientists Hershey and Chase to prove that 'DNA is the genetic material'. **OR** (i) What is the genetic code? (ii) Mention three characteristics of the genetic code. (iii) Which is the initiation codon in the genetic code?

[5]

Page 6 of 6