Botany · Class 11 Science

Tamil Nadu Dge Class 11 Botany — 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.

2018–2026
Years of papers: 8
Total Papers: 8
Real Board Papers: 0
Sample papers: 304
Real-paper Q & A: 0
Sample-paper Q & A

Real board-paper questions available, by year

38 Q2026complete

38 Q2025complete

38 Q2024complete

38 Q2023complete

38 Q2022complete

—2021No regular exam held this year

38 Q2020complete

38 Q2019complete

38 Q2018complete

2021 — No regular exam held this year: Tamil Nadu cancelled the March 2021 Class 9/10/11 Public Examinations outright (COVID-19 2nd wave) — students were promoted using their quarterly/half-yearly marks, so no genuine full-cohort exam was ever sat. The single "September 2021" paper on DGE’s own archive that year is a private-candidate/improvement sitting, not the regular annual exam, so it is not published here (mirrors this platform’s standing "main sitting only" convention, applied identically to TN-DGE’s Class-12 2021 papers).

Tamil Nadu HSC First Year (DGE) Board 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: 38
Duration: 180 min
Sections: 4

The marks / questions / duration above are the official exam pattern. We currently have 38 of this paper’s questions (100% of the full paper), with 38 fully solved. Questions we couldn’t yet extract or verify are held — never shown as complete.

Sections & marks

Section	Type	Questions	Marks each	Total
ISection I	mcq	15	1	15
IISection II	short_answer_choice	6	2	12
IIISection III	short_answer_choice	6	3	18
IVSection IV	long_answer_or	5	5	25
Total		38		70

The question paper

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

Board Examination

Botany

Tamil Nadu HSC First Year (DGE) Board 2026 · Set ANNUAL

Series/Set: ANNUALRoll No. ________

Time Allowed: 3 hoursMaximum Marks: 70

General Instructions

This question paper contains 38 questions divided into 4 sections — I, II, III, IV.
Section I comprises 15 questions of 1 mark each (mcq).
Section II comprises 6 questions of 2 marks each (short_answer_choice).
Section III comprises 6 questions of 3 marks each (short_answer_choice).
Section IV comprises 5 questions of 5 marks each (long_answer_or).

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

Section A

Q1.

Who discovered Prions?

(a) T.O. Diener
(b) J.W. Randles
(c) R.H. Whittaker
(d) Stanley B. Prusiner

[1]

Q2.

Which of the plant group has gametophyte as a dominant phase?

(a) Gymnosperms
(b) Pteridophyte
(c) Angiosperms
(d) Bryophyte

[1]

Q3.

Root which develops other than from radicle is called ________.

(a) Adventitious root
(b) Tap root
(c) Primary root
(d) Lateral root

[1]

Q4.

Gynoecium with united carpels is termed as ________.

(a) Multicarpellary
(b) Syncarpous
(c) Apocarpous
(d) None of the above

[1]

Q5.

The taxonomy which involves the similarities and dissimilarities among the immune system of different taxa is termed as ________.

(a) Serotaxonomy
(b) Chemotaxonomy
(c) Numerical taxonomy
(d) Molecular systematics

[1]

Q6.

The stability of chromosome is determined by ________.

(a) Satellite
(b) Centromere
(c) Telomere
(d) Kinetochore

[1]

Q7.

The correct sequence in cell cycle is:

(a) G1 - S - G2 - M
(b) S - M - G1 - G2
(c) M - G1 - G2 - S
(d) S - G1 - G2 - M

[1]

Page 1 of 6

Q8.

Chitin is a linear polymer of ____ joined together by beta-1,4 glycosidic linkages. (a) alpha-1,4-glucan malto hydrolase (b) beta-D-glucose units (c) D-glycuronic acid (d) N-acetyl-D-glucosamine units

[1]

Q9.

Bicollateral vascular bundles are present in: (a) Dracena (b) Cucurbitaceae (c) Yucca (d) Liliaceae

[1]

Q10.

What is the fate of primary xylem in a dicot stem showing extensive secondary growth? (a) May or may not get crushed. (b) It is retained in the centre of the axis. (c) It gets surrounded by primary phloem. (d) It gets crushed.

[1]

Q11.

Which among the following is correct? (i) Apoplast is fastest and operates in non living part. (ii) Transmembrane route includes vacuole. (iii) Symplast interconnect the nearby cell through plasmodesmata. (iv) Symplast and transmembrane route are in living part of the cell. (a) (iii) and (iv) (b) (i) and (ii) (c) (i), (ii), (iii), (iv) (d) (ii) and (iii)

[1]

Q12.

Match the following: (1) Die back disease of citrus (2) Whip tail disease (3) Brown heart disease of Beetroot (4) Little leaf -- (i) Mo (ii) Zn (iii) Cu (iv) B (a) (1)-(i), (2)-(iii), (3)-(ii), (4)-(iv) (b) (1)-(iii), (2)-(ii), (3)-(iv), (4)-(i) (c) (1)-(iii), (2)-(iv), (3)-(ii), (4)-(i) (d) (1)-(iii), (2)-(i), (3)-(iv), (4)-(ii)

[1]

Q13.

For every CO2 molecule entering the C3 cycle, the number of ATP and NADPH required is: (a) 3 ATP + 2 NADPH (b) 2 ATP + 2 NADPH (c) 3 ATP + 3 NADPH (d) 2 ATP + 3 NADPH

[1]

Q14.

Glycolysis takes place in: (a) Chloroplast (b) Cytoplasm (c) Ribosome (d) Mitochondria

[1]

Q15.

Seed dormancy allows the plants to: (a) Reduce viability (b) Overcome unfavourable climatic conditions (c) Prevent deterioration of seeds (d) Develop healthy seeds

[1]

Page 2 of 6

Section B

Q1.

Differentiate Oidium and Chlamydospore.

[2]

Q2.

Draw and label the structure of Chlamydomonas.

[2]

Q3.

Differentiate between Phylloclade and Cladode.

[2]

Q4.

Give the technical terms for the following. (a) A sterile stamen (b) Stamens are attached to petals.

[2]

Q5.

Write any two differences between plant cell and animal cell.

[2]

Q6.

What is meant by Amitosis?

[2]

Q7.

Define "Enzymes".

[2]

Q8.

What is wood botanically?

[2]

Page 3 of 6

Q9.

List out the non-photosynthetic parts of a plant that need a supply of Sucrose.

[2]

Section C

Q1.

What is Nucule?

[3]

Q2.

How root climbers differ from stem climbers?

[3]

Q3.

What are the physiological effects of plants facing drought condition?

[3]

Q4.

Give an account of G0 phase.

[3]

Q5.

Central part of wood is dark. Why?

[3]

Q6.

Define Guttation.

[3]

Page 4 of 6

Q7.

A tree is believed to be releasing oxygen during night time. Do you believe the truthfulness of this statement? Justify your answer by giving reasons.

[3]

Q8.

Draw the floral diagram and write the floral formula of Datura metal.

[3]

Q9.

Write any three enzymes involved in EMP pathway.

[3]

Section D

Q1.

(a) Write the outline of the life cycle of Agaricus. **OR** (b) Explain Hydroponics with the help of a diagram.

[5]

Q2.

(a) What is special type of inflorescence? Explain the structure of Cyathium inflorescence. **OR** (b) List out the properties of water.

[5]

Page 5 of 6

Q3.

(a) What are the roles of botanical gardens in conserving biodiversity? Discuss. **OR** (b) Grasses have an adaptive mechanism to compensate photorespiratory losses. Name and describe the mechanism.

[5]

Q4.

(a) Draw and label the structure of Chloroplast. **OR** (b) Distinguish the anatomy of dicot root from monocot root.

[5]

Q5.

(a) Explain the reactions taking place in mitochondrial inner membrane. **OR** (b) What are the physiological effects of Cytokinins?

[5]

Page 6 of 6