Biology · Class 11 Science

Jharkhand Jac 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.

2019–2026
Years of papers: 5
Total Papers: 5
Real Board Papers: 0
Sample papers: 188
Real-paper Q & A: 0
Sample-paper Q & A

Real board-paper questions available, by year

40 Q2026complete

—2025Paper not available

—2024Paper not available

—2023Paper not available

59 Q20222 sets

—2021Likely no exam held (COVID-19)

40 Q2020complete

49 Q2019complete

—2018Paper not available

2025 — Paper not available: The JAC Intermediate 1st Year exam was presumably held this year, but no verified question paper for this subject has been published by any source we check — the official archive and the public past-paper archives. We publish only a paper we can verify against a real printed original — it will appear here once it is.

2024 — Paper not available: The JAC Intermediate 1st Year exam was presumably held this year, but no verified question paper for this subject has been published by any source we check — the official archive and the public past-paper archives. We publish only a paper we can verify against a real printed original — it will appear here once it is.

2023 — Paper not available: The JAC Intermediate 1st Year exam was presumably held this year, but no verified question paper for this subject has been published by any source we check — the official archive and the public past-paper archives. We publish only a paper we can verify against a real printed original — it will appear here once it is.

2021 — Likely no exam held (COVID-19): JAC confirmed the Class-12 (Intermediate 2nd Year) examination was cancelled in 2021 due to COVID-19, and no source we check lists any 2021 paper for Class-11 either — strongly suggesting the same cancellation applied, though no source names Class-11 explicitly. We publish only a paper we can verify against a real printed original, so we show none rather than an unconfirmed copy.

2018 — Paper not available: The JAC Intermediate 1st Year exam was presumably held this year, but no verified question paper for this subject has been published by any source we check — the official archive and the public past-paper archives. We publish only a paper we can verify against a real printed original — it will appear here once it is.

JAC Intermediate Board (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: 40
Questions: 40
Duration: 60 min
Sections: 1

The marks / questions / duration above are the official exam pattern. We currently have 40 of this paper’s questions (100% of the full paper), with 40 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	40	1	40
Total		40		40

The question paper

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

Board Examination

Biology

JAC Intermediate Board (1st Year) 2026 · Set ANNUAL

Series/Set: ANNUALRoll No. ________

Time Allowed: 1 hourMaximum Marks: 40

General Instructions

This question paper contains 40 questions divided into 1 sections — A.
Section A comprises 40 questions of 1 mark each (mcq).

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

Section A

mcq · 1 mark each · 40 of 40 shown

Q1.

Rapid multiplication of which of the following groups of organisms make the sea appear red and cause red tide?

(a) Protozoa
(b) Euglenoid
(c) Dinoflagellate
(d) Chrysophyte

[1]

Q2.

A special membranous structure in prokaryotic cells, which is formed by the extension of plasma membrane into the cell is

(a) mesosome
(b) ribosome
(c) cilia
(d) pili

[1]

Q3.

The body of the organisms of which phylum is supported by a skeleton made up of spicules?

(a) Coelenterata
(b) Ctenophora
(c) Porifera
(d) Mollusca

[1]

Q4.

The epidermal cells in the vicinity of the guard cells, which become specialized in their shape and size are known as

(a) companion cells
(b) subsidiary cells
(c) bulliform cells
(d) casparian strips

[1]

Q5.

Consider the following reaction: S reduced + S' oxidised -> S oxidised + S' reduced. Which of the following enzymes catalyses this reaction?

(a) Lyases
(b) Hydrolases
(c) Transferases
(d) Dehydrogenases

[1]

Q6.

In which of the following, is glenoid cavity present?

(a) Pelvic girdle
(b) Humerus
(c) Pectoral girdle
(d) Femur

[1]

Page 1 of 5

Q7.

Which of the following statements regarding a resting axonal membrane is true? (a) At resting the axonal membrane is comparatively more permeable to sodium ions (Na+) (b) The outer surface of the axonal membrane possesses a positive charge while its inner surface is negatively charged (c) The outer surface of the axonal membrane possesses a negative charge while its inner surface is positively charged (d) The fluid outside the axon contains a low concentration of Na+

[1]

Q8.

In which part of the nephron does reabsorption of essential nutrients, ions and water take place? (a) Proximal convoluted tubule (b) Henle's loop (c) Collecting duct (d) Glomerulus

[1]

Q9.

The maximum volume of air that can inspire in by the lungs after a forceful expiration is (a) Expiratory capacity (b) Residual volume (c) Inspiratory capacity (d) Vital capacity

[1]

Q10.

Cell wall of the phaeophyceae is made up of (a) Cellulose (b) Cellulose and algin (c) Cellulose and pectin (d) Algin

[1]

Q11.

Correct sequence of taxonomic categories is (a) Species -> Genus -> Order -> Phylum (b) Genus -> Species -> Phylum -> Order (c) Species -> Order -> Genus -> Phylum (d) Genus -> Species -> Order -> Phylum

[1]

Q12.

Which of the following hormones is secreted by posterior pituitary (Neurohypophysis)? (a) Prolactin (b) Luteinizing hormone (c) Vasopressin (d) Growth hormone

[1]

Q13.

The valve present between right auricle and right ventricle is (a) Bicuspid valve (b) Tricuspid valve (c) Semilunar valve (d) None of these

[1]

Q14.

Which of the following is the primary precursor of IAA? (a) Gibberellin (b) Ethylene (c) Phenylalanine (d) Tryptophan

[1]

Q15.

A sterile stamen is called (a) placenta (b) staminode (c) filament (d) style

[1]

Q16.

Which of the following is responsible for the transport of electrons in electron transport system? (a) Pyruvic acid (b) Fucoxanthin (c) Cytochrome (d) Acetic acid

[1]

Page 2 of 5

Q17.

During which process in photosynthesis, splitting of water takes place? (a) Calvin cycle (b) Non-cyclic photophosphorylation (c) Oxidative phosphorylation (d) Cyclic photophosphorylation

[1]

Q18.

The excretory product in frog is (a) uric acid (b) uric acid and ammonia (c) urea (d) ammonia

[1]

Q19.

The phase between Meiosis I and Meiosis II is (a) Prophase II (b) Interkinesis (c) Karyokinesis (d) Diplotene

[1]

Q20.

Which of the following is also known as sac fungi? (a) Ascomycetes (b) Phycomycetes (c) Deuteromycetes (d) Basidiomycetes

[1]

Q21.

When xylem and phloem within a vascular bundle are arranged in an alternate manner on different radii, the arrangement is called (a) radial (b) open conjoint (c) closed conjoint (d) Both (A) and (B)

[1]

Q22.

Which hormone is responsible for promoting the production of antibodies to provide humoral immunity? (a) Thyroxine (b) Catecholamines (c) Thymosin (d) Insulin

[1]

Q23.

The site for active ribosomal RNA synthesis is (a) Perinuclear space (b) Endoplasmic reticulum (c) Cytoplasm (d) Nucleolus

[1]

Q24.

Which of the following statements is correct? (a) Pons, cerebellum and medulla are part of forebrain (b) Pons, cerebellum and medulla are part of hindbrain (c) Cerebrum, thalamus and hypothalamus are part of hindbrain (d) Cerebrum, thalamus and hypothalamus are part of midbrain

[1]

Q25.

In tissues low pO2, high pCO2, high H+ concentration and higher temperature exist, those conditions are favourable for (a) formation of oxyhaemoglobin (b) dissociation of oxygen from the oxyhaemoglobin (c) less binding of carbon dioxide occurs (d) none of these

[1]

Q26.

The outer dermal scale of reptile is made up of (a) Keratin (b) Chitin (c) Cuticle (d) Calcium

[1]

Page 3 of 5

Q27.

Phylogenetic classification system is based on (a) Cytological information (b) All observable characteristics (c) The use of chemical constituents (d) Evolutionary relationship between the various organisms

[1]

Q28.

In frog a small, median chamber is present that is used to pass faecal matter, urine and sperms to the exterior. It is (a) Cloaca (b) Stomach (c) Liver (d) Conus arteriosus

[1]

Q29.

Flowers of which of the following plants are zygomorphic? (a) Mustard (b) Datura (c) Chilli (d) Gulmohar

[1]

Q30.

Which type of joint allows for the widest range of movement? (a) Ball and socket joint (b) Gliding joint (c) Fibrous joint (d) Hinge joint

[1]

Q31.

Which of the following substances is normally found in urine in significant amounts? (a) Collagen (b) Insulin (c) Ammonia (d) Urea

[1]

Q32.

The disease which affects the vessels that supply blood to the heart muscle is (a) Angina (b) Heart failure (c) Atherosclerosis (d) Hypertension

[1]

Q33.

In plants the living differentiated cells, that by now have lost the capacity to divide can regain the capacity of division under certain conditions. This phenomenon is termed as (a) Dedifferentiation (b) Differentiation (c) Redifferentiation (d) Growth

[1]

Q34.

During the conversion of succinyl-CoA to succinic acid (a) NAD+ is regenerated from NADH (b) NAD+ is reduced to NADH + H+ (c) a molecule of GTP is synthesized (d) FAD+ is reduced to FADH2

[1]

Q35.

In Hatch and Slack pathway the primary acceptor of CO2 is (a) RuBisCO (b) Phosphoenol pyruvate (PEP) (c) RuBP (d) Oxaloacetic acid

[1]

Q36.

In which stage of Meiosis I does synaptonemal complex dissolve? (a) Zygotene (b) Leptotene (c) Diplotene (d) Diakinesis

[1]

Page 4 of 5

Q37.

How many ATPs are produced in Krebs cycle? (a) 8 ATP (b) 16 ATP (c) 24 ATP (d) 38 ATP

[1]

Q38.

What is the absorption peak of the reaction centre chlorophyll a, in PS I? (a) 700 nm (b) 600 nm (c) 680 nm (d) 780 nm

[1]

Q39.

What is the average cell cycle span for a mammalian cell? (a) 2 hours (b) 12 hours (c) 6 hours (d) 24 hours

[1]

Q40.

Which of the following statements regarding DNA is true? (i) The bond between the phosphate and hydroxyl group of sugar is a glycosidic bond. (ii) The backbone is formed by the sugar-phosphate-sugar chain. (iii) The nitrogenous bases are projected more or less perpendicular to the backbone. (iv) The two strands of polynucleotides are antiparallel. (a) (i) only (b) (i) and (ii) (c) (ii), (iii) and (iv) (d) (i), (iii) and (iv)

[1]

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