Biology · Class 11 Science

Manipur Cohsem Class 11 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.

2020–2026
Years of papers: 7
Total Papers: 7
Real Board Papers: 0
Sample papers: 246
Real-paper Q & A: 0
Sample-paper Q & A

Real board-paper questions available, by year

37 Q2026complete

37 Q2025complete

36 Q2024complete

34 Q2023complete

34 Q2022complete

34 Q2021complete

34 Q2020complete

—2019Paper not yet available

—2018Paper not yet available

2019 — Paper not yet available: The COHSEM Higher Secondary 1st Year exam was presumably held this year, but no verified question paper for this subject has been found from the sources we check (official cohsem.nic.in archive, Wayback Machine, third-party aggregators). We publish only a paper we can verify against a real printed original — it will appear here once it is.

2018 — Paper not yet available: The COHSEM Higher Secondary 1st Year exam was presumably held this year, but no verified question paper for this subject has been found from the sources we check (official cohsem.nic.in archive, Wayback Machine, third-party aggregators). We publish only a paper we can verify against a real printed original — it will appear here once it is.

Council of Higher Secondary Education, Manipur (Higher Secondary 1st Year) 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: 180 min
Sections: 1

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	compulsory	37	—	—
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

Council of Higher Secondary Education, Manipur (Higher Secondary 1st Year) 2026 · Set ANNUAL

Series/Set: ANNUALRoll No. ________

Time Allowed: 3 hoursMaximum Marks: 70

General Instructions

This question paper contains 37 questions divided into 1 sections — A.
Section A comprises 37 questions (compulsory).

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

Section A

compulsory · 18 of 37 shown

Q1.

The Kingdom that is common to unicellular animals and plants is –

(a) Monera
(b) Plantae
(c) Protista
(d) Fungi

[1]

Q2.

The waxy material deposited in the casparian strip of the endodermis is –

(a) Pectin
(b) Suberin
(c) Lignin
(d) Cellulose

[1]

Q3.

The single membrane - bound cell organelle is –

(a) Lysosome
(b) Ribosome
(c) Mitochondria
(d) Plastid

[1]

Q4.

Which one of the following groups of animals is bilaterally symmetrical and triploblastic?

(a) Coelenterates
(b) Ctenophores
(c) Sponges
(d) Aschelminthes

[1]

Q5.

Simple leaves are differrent from compound leaves in presence of –

(a) Serrated margins
(b) Stipules at the base
(c) Reticulate venation
(d) Single leaf blade

[1]

Q6.

Which one of the following characteristics of chloroplasts constitutes to their semi-autonomy?

(a) Function of secretion
(b) Ability to synthesize protein
(c) Presence of lysosome
(d) Role of cellular respiration

[1]

Page 1 of 6

Q7.

RuBisCO is required in a very high concentration for photosynthesis because – (a) It acts as an oxygenase (b) It is degraded very rapidly (c) It is very slow acting enzyme (d) It catalyses a reversible reaction

[1]

Q8.

Which one of the following proteins is involved in coagulation of blood? (a) Albumin (b) Globulin (c) Serum (d) Fibrinogen

[1]

Q9.

Assertion: In dicot stem, vascular bundles are open type. Reason: Dicot stem bears cambium in the vascular bundles. (a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion. (b) Both Assertion and Reason are true but Reason is not the correct explanation of the Assertion. (c) Assertion is true but Reason is false. (d) Assertion is false but Reason is true.

[1]

Q10.

Assertion: Series of reactions in TCA cycle takes place in mitochondria. Reason: Mitochondrial envelope contains all the respiratory enzymes required for respiratory reactions. (a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion. (b) Both Assertion and Reason are true but Reason is not the correct explanation of the Assertion. (c) Assertion is true but Reason is false. (d) Assertion is false but Reason is true.

[1]

Q11.

What is aestivation?

[1]

Q12.

Mention the chemical nature of plasma membrane of a eukaryotic cell.

[1]

Q13.

Why is the placentation in tomato said to be axile?

[1]

Q14.

How is co-enzyme different from co-factor?

[1]

Q15.

Why is abscisic acid called stress hormone in plants?

[1]

Q16.

"Frogs exhibit a dual respiratory system". Justify.

[1]

Page 2 of 6

Q17.

"Plants growth is generally indeterminate". Comment.

[1]

Q18.

An old patient with end-stage renal disease is undergoing hemodialysis treatment. He has been experiencing fatigue, swelling and shortness of breath. (a) What is the primary purpose of hemodialysis? **OR** A 40 yrs. old worker in a manufacturing plant presents with symptoms of wheezing, cough and shortness of breath that worsen during work shifts. (a) What is the likely cause of the old worker's symptoms?

[1]

Section B

Q1.

What is electrocardiogram? Write its significance.

[2]

Q2.

How does the study of the nature of coelom contribute to animal classification?

[2]

Q3.

Give two points of difference between cymose and racemose inflorescence.

[2]

Q4.

Why do some cells enter the G0 phase during cell cycle and what triggers this decision?

[2]

Q5.

How does the structure of a myelinated nerve fibre contribute to its faster conduction velocity compared to a non-myelinated nerve fibre?

[2]

Q6.

In mango and coconut, the fruit is known as drupe. Give reason.

[2]

Page 3 of 6

Q7.

"Telophase is the reverse of prophase". Justify.

[2]

Q8.

What would happen if tubular reabsorption fails during urine formation?

[2]

Q9.

Draw a neat diagram of L.S. of a monocotyledonous seed (maize) and label scutellum.

[2]

Q10.

Draw a neat diagram of L.S. of a mitochondrion and label crista.

[2]

Q11.

An old patient with end-stage renal disease is undergoing hemodialysis treatment. He has been experiencing fatigue, swelling and shortness of breath. (b) How does the artificial kidney machine remove waste products from the patient's blood? **OR** A 40 yrs. old worker in a manufacturing plant presents with symptoms of wheezing, cough and shortness of breath that worsen during work shifts. (b) What would be the primary treatment and preventive strategies of the worker?

[2]

Section C

Q1.

What is oxidative phosphorylation? Name the enzyme involved in this process and its location.

[3]

Q2.

Both gymnosperms and angiosperms bear seeds, then why are they classified separately?

[3]

Page 4 of 6

Q3.

Explain how ATP synthesis during light reaction of photosynthesis is a chemiosmotic phenomenon.

[3]

Q4.

Differentiate between blood and lymph by giving three points. **OR** Give three points of difference between cerebrum and cerebellum.

[3]

Q5.

"Even though a very few cells in C4 plants carry out the biosynthetic calvin pathway, yet they are highly productive". Justify. **OR** "The role of ethylene is both positive and negative". Analyse.

[3]

Section D

Q1.

Explain the key events that occurred during sub-stages of prophase - I in meiosis. **OR** Explain the basis of enzyme classification and provide examples to illustrate how different types of enzymes catalyze specific reactions.

[5]

Q2.

Differentiate between glycolysis and Kreb's cycle by giving five points. **OR** Give five points of difference between C3 plants and C4 plants.

[5]

Page 5 of 6

Q3.

"Hypothalamus is the super master endocrine gland in human body". Justify. **OR** "Cardiac muscle exhibits a blending characteristics of both skeletal and visceral muscles". Analyse.

[5]

Page 6 of 6