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Biology · Class 11 Science

Assam Ahsec 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.

2018–2026
Years of papers
7
Total Papers
7
Real Board Papers
0
Sample papers
244
Real-paper Q & A
0
Sample-paper Q & A

Real board-paper questions available, by year

—2026Paper not yet available
54 Q2025complete
46 Q2024complete
22 Q2023complete
22 Q2022complete
—2021Exam cancelled (COVID-19)
—2020Not available
16 Q2019complete
41 Q2018complete

2026 — Paper not yet available: The AHSEC HS 1st Year exam was presumably held this year, but no verified question paper for this subject has been found from the sources we check. We publish only a paper we can verify against a real printed original — it will appear here once it is.

2021 — Exam cancelled (COVID-19): AHSEC cancelled the HS 1st Year (Class-11) examination in 2021 due to COVID-19; an order dated 7 May 2021 promoted all registered students to HS 2nd Year without sitting it. No annual question paper was conducted or printed that year, so none exists to publish.

AHSEC Higher Secondary (HS) 1st Year 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
—
Questions
—
Duration
—
Sections
—

The marks / questions / duration above are the official exam pattern. We currently have 43 of this paper’s questions, with 43 fully solved. Questions we couldn’t yet extract or verify are held — never shown as complete.

The question paper

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

Board Examination

Biology

AHSEC Higher Secondary (HS) 1st Year Examination 2026 · Set ANNUAL

Series/Set: ANNUALRoll No. ________
Time Allowed: —Maximum Marks: —
Section B

Q1.
The five kingdom classification was proposed by
  • (a) Carolus Linnaeus
  • (b) Charles Darwin
  • (c) R. H. Whittaker
  • (d) Robert Hooke
[1]
Q2.
The scientific name of tiger is
  • (a) Panthera leo
  • (b) Panthera tigris
  • (c) Panthera pardus
  • (d) Musca domestica
[1]
Q3.
The major pigments is red algae are
  • (a) Chlorophyll a, b
  • (b) Chlorophyll a, c fucoxanthin
  • (c) Chlorophyll a, d phycoerythrin
  • (d) Fucoxanthin, phycoerythrin
[1]
Q4.
The cell wall of Fungi contains
  • (a) Protein
  • (b) Chitin
  • (c) Cellulose
  • (d) Peptidoglycan
[1]
Q5.
The arrangement of ovules within the ovary is known as
  • (a) Placentation
  • (b) Aestivation
  • (c) Venation
  • (d) Inflorescence
[1]
Q6.
In plants, secondary growth in thickness is due to the activity of
  • (a) Pith
  • (b) Xylem
  • (c) Phloem
  • (d) Cambium
[1]
Q7.
New cells generate from
  • (a) Abiotic materials
  • (b) Pre-existing cells
  • (c) Bacterial fermentation
  • (d) Regeneration of old cells
[1]
Page 1 of 6
Q8.
A plant cell usually differs from an animal cell in the absence of (a) Ribosome (b) Centriole (c) Endoplasmic reticulum (d) Mitochondria
[1]
Q9.
Tyrosine, tryptophan, phenylalanine are (a) Acidic amino acid (b) Neutral Amino acid (c) Aromatic amino acid (d) Basic amino acid
[1]
Q10.
DNA synthesis or replication takes place during (a) G1 phase (Gap 1) (b) S phase (Synthesis) (c) G2 phase (Gap 2) (d) Interphase
[1]
Q11.
Dark reaction of photosynthesis takes place in (a) Grana (b) Stroma (c) Ribosomes (d) DNA
[1]
Q12.
Glycolysis is also known as (a) TCA cycle (b) EMP pathway (c) Calvin Cycle (d) C4 Pathway
[1]
Q13.
Which of the following is a gaseous plant growth regulator (PGR) (a) Ethylene (b) Abscisic acid (c) Cytokinin (d) Auxin
[1]
Q14.
Which of the following is not correct? (a) Robert Brown discovered the cell (b) Lipids are not strictly macromolecules (c) There are some nucleic acids that behave like enzymes. These are called ribozymes (d) Quiescent stage (Go) is an inactive stage of the cell cycle.
[1]
Q15.
The correct equation, that would represent the overall process of photosynthesis is (a) 6CO2 + 12H2O --(Light/Chlorophyll)--> C6H12O6 + 6H2O + 6O2 (up arrow) (b) C6H12O6 + 6O2 -> 6CO2 + 6H2O + Energy (c) 6CO2 + 6H2O --(Light/Chlorophyll)--> C6H12O6 + 6H2O + 6O2 (up arrow) (d) C6H12O6 + 6O2 -> 6CO2 + 6H2O + e-
[1]
Q16.
Auxin was first isolated from (a) Tips of coleoptiles of oat seedlings (b) Human urine (c) Coconut milk (d) Ripened oranges
[1]
Q17.
Which of the following is unicellular? (a) Trichomes (b) Root hairs (c) Cuticle (d) Stele
[1]
Page 2 of 6
Q18.
Describe the important properties of enzyme.
[4]
Q19.
Distinguish between the following (any two): (3x2=6) a) Cyclic and non-cyclic photophosphorylation b) Aerobic and anaerobic respiration c) DNA and RNA d) Reticulate and Parallel Venation
[6]
Q20.
Answer any four of the following questions: (2x4=8) a) What are the characteristic features of Euglenoids? b) Which of the plant group is called amphibians of plant kingdom and why? c) What is 'cell theory'? Who proposed this theory? d) What is the significance of meiosis? e) Draw a labelled diagram of a dorsiventral leaf (internal structure)
[8]
Section Z

Q1.
Radula is found in organisms of ___ phylum. (a) Porifera (b) Mammals (c) Arthropoda (d) Mollusca
[1]
Q2.
The undifferentiated layer between endoderm and ectoderm is called. (a) Mesoglea (b) Coelom (c) Mesoderm (d) RBC
[1]
Q3.
Pseudocoelom is a characteristic of which organism? (a) Starfish (b) Spongilla (c) Pila (d) Ascaris
[1]
Page 3 of 6
Q4.
On the basis of nitrogenous wastes, the adult frogs are ___ (a) Uricotelic (b) Urotelic (c) Ammonotelic (d) All of these
[1]
Q5.
Deficiency of Vasopressin hormone causes (a) Diabetes mellitus (b) Goitre (c) Grave's disease (d) Diabetes insipidus
[1]
Q6.
Insulin promotes ___ (a) Glycogenesis (b) glucosuria (c) Glycogenolysis (d) Gluconeogenesis
[1]
Q7.
Node of Ranvier is found in: (a) Muscle (b) Dendrites (c) Right auricle (d) Axon
[1]
Q8.
ATP ase enzyme needed for muscle contraction is located in: (a) Myosin (b) Actin (c) Acitin (d) Troponin
[1]
Q9.
Pick out the correct match (a) Sternum = 14 bones (b) Pelvis = 3 bones (c) Ribs = 20 bones (d) Face = 5 bones
[1]
Q10.
Mitral valve is present between: (a) Right atrium and Right ventricle (b) Left atrium and left ventricle (c) Right and left ventricles (d) Right and left auricle
[1]
Q11.
When CO2 concentration in blood increases, breathing becomes: (a) Slow and deep (b) faster and deeper (c) Shallower and slow (d) No affect on breathing
[1]
Q12.
Partial pressure of oxygen in the lungs is: (a) 100 mmHg (b) 110 mmHg (c) 104 mmHg (d) 60 mmHg
[1]
Q13.
Filtration of the blood takes place at: (a) PCT (b) DCT (c) Collecting duct (d) Malpighian body
[1]
Q14.
Haemodialysis is done when the person is suffering from: (a) Diabetes mellitus (b) Diabetes insipidus (c) Ureamia (d) Goitre
[1]
Page 4 of 6
Q15.
Juxta Glomerular cells of kidneys secrete hormone: (a) Angiotensinogen (b) Angiotensin-II (c) Coherin (d) Renin
[1]
Q16.
The corpora quadrigemina is a part of (a) Forebrain (b) Midbrain (c) Hindbrain (d) Spinal cord
[1]
Q17.
Second messenger is: (a) GTP (b) ATP (c) cAMP (d) ATP and AMP
[1]
Q18.
Which is not involved in muscular contraction? (a) Ca (b) Troponin (c) Actin (d) Mg
[1]
Q19.
Distinguish between the following (any one): (1x2=2) a) Endocrine gland and Exocrine gland b) Arthropoda and Mollusca
[2]
Q20.
Draw a neat labelled diagram of a nephron.
[3]
Q21.
Briefly describe double circulation.
[3]
Q22.
Write short notes on any two of the following: (2x2=4) a) Symmetry in animals b) Lymph c) Neuron d) Adrenal gland
[4]
Page 5 of 6
Q23.
Write five basic characteristics of phylum porifera.
[5]
Page 6 of 6