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Biology · Class 11 Science

Bihar Bseb 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.

2022–2026
Years of papers
3
Total Papers
3
Real Board Papers
0
Sample papers
222
Real-paper Q & A
0
Sample-paper Q & A

Real board-paper questions available, by year

—2026Paper not available
—2025Paper not available
—2024Paper not available
—2023Paper not available
—2022Paper not available
—2021Paper not available
—2020Paper not available
—2019Paper not available

2026 — Paper not available: The Bihar Board (BSEB) held the Class-XI (Intermediate 1st Year) Annual Examination this year, but no verified question paper for this subject is available from the sources we check — the official archive and the public past-paper archives. We publish only a paper we can verify against a real printed original, so we show none rather than an unconfirmed copy.

2025 — Paper not available: The Bihar Board (BSEB) held the Class-XI (Intermediate 1st Year) Annual Examination this year, but no verified question paper for this subject is available from the sources we check — the official archive and the public past-paper archives. We publish only a paper we can verify against a real printed original, so we show none rather than an unconfirmed copy.

2024 — Paper not available: The Bihar Board (BSEB) held the Class-XI (Intermediate 1st Year) Annual Examination this year, but no verified question paper for this subject is available from the sources we check — the official archive and the public past-paper archives. We publish only a paper we can verify against a real printed original, so we show none rather than an unconfirmed copy.

2023 — Paper not available: The Bihar Board (BSEB) held the Class-XI (Intermediate 1st Year) Annual Examination this year, but no verified question paper for this subject is available from the sources we check — the official archive and the public past-paper archives. We publish only a paper we can verify against a real printed original, so we show none rather than an unconfirmed copy.

2022 — Paper not available: The Bihar Board (BSEB) held the Class-XI (Intermediate 1st Year) Annual Examination this year, but no verified question paper for this subject is available from the sources we check — the official archive and the public past-paper archives. We publish only a paper we can verify against a real printed original, so we show none rather than an unconfirmed copy.

2021 — Paper not available: The Bihar Board (BSEB) held the Class-XI (Intermediate 1st Year) Annual Examination this year, but no verified question paper for this subject is available from the sources we check — the official archive and the public past-paper archives. We publish only a paper we can verify against a real printed original, so we show none rather than an unconfirmed copy.

2020 — Paper not available: The Bihar Board (BSEB) held the Class-XI (Intermediate 1st Year) Annual Examination this year, but no verified question paper for this subject is available from the sources we check — the official archive and the public past-paper archives. We publish only a paper we can verify against a real printed original, so we show none rather than an unconfirmed copy.

2019 — Paper not available: The Bihar Board (BSEB) held the Class-XI (Intermediate 1st Year) Annual Examination this year, but no verified question paper for this subject is available from the sources we check — the official archive and the public past-paper archives. We publish only a paper we can verify against a real printed original, so we show none rather than an unconfirmed copy.

Bihar Board Intermediate 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
—
Questions
—
Duration
—
Sections
—

The marks / questions / duration above are the official exam pattern. We currently have 96 of this paper’s questions, with 96 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

Bihar Board Intermediate 1st Year 2026 · Set ANNUAL

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

Q1.
What causes potato spindle tuber disease ?
  • (a) Lichen
  • (b) Bacteria
  • (c) Viroids
  • (d) Virus
[1]
Q2.
What is the basic unit of classification ?
  • (a) Genus
  • (b) Species
  • (c) Kingdom
  • (d) Family
[1]
Q3.
Which of the following kingdoms has organisms with peptidoglycan in their cell wall ?
  • (a) Protista
  • (b) Fungi
  • (c) Plantae
  • (d) Monera
[1]
Q4.
Which of the following can fix atmospheric nitrogen in the soil ?
  • (a) Amoeba
  • (b) Rhizobium
  • (c) Plasmodium
  • (d) Paramoecium
[1]
Q5.
Which of the following plants lacks vascular tissue ?
  • (a) Pteridophyte
  • (b) Gymnosperm
  • (c) Bryophyte
  • (d) Angiosperm
[1]
Q6.
Double fertilisation is a characteristic of which of the following ?
  • (a) Bryophyte
  • (b) Gymnosperm
  • (c) Angiosperm
  • (d) Pteridophyte
[1]
Q7.
Which of the following shows radial symmetry ?
  • (a) Earthworm
  • (b) Starfish
  • (c) Cockroach
  • (d) Fish
[1]
Page 1 of 11
Q8.
In which phylum is the water vascular system found ? (a) Mollusca (b) Echinodermata (c) Arthropoda (d) Anelida
[1]
Q9.
Which of the following has a true coelom derived from the mesoderm ? (a) Platyhelminthes (b) Coelenterata (c) Annelida (d) Cnidaria
[1]
Q10.
What is the pattern of arrangement of leaves on the stem or branch called ? (a) Phyllotaxy (b) Venation (c) Inflorescence (d) Phylloclade
[1]
Q11.
Which of the following is an example of tap root modified for food storage ? (a) Carrot (b) Potato (c) Onion (d) Maize
[1]
Q12.
Which type of venation is found in dicot leaves ? (a) Parallel (b) Reticulate (c) Circular (d) None of these
[1]
Q13.
Which type of xylem element is most efficient in water conduction ? (a) Tracheid (b) Vessels (c) Xylem fibres (d) Xylem parenchyma
[1]
Q14.
What is the another name for cork cambium ? (a) Vascular cambium (b) Phellogen (c) Pericycle (d) Phelloderm
[1]
Q15.
Which of the following in dicot stem, originates due to the activity of the vascular cambium ? (a) Primary xylem (b) Medullary rays (c) Secondary xylem (d) Pith
[1]
Q16.
What is the main function of companion cells in phloem ? (a) Conduction of water (b) Providing support (c) Assisting sieve tube elements (d) Storage of food
[1]
Q17.
Which of the following connective tissues connects muscles to bones ? (a) Ligament (b) Cartilage (c) Tendon (d) Areolar tissue
[1]
Q18.
Which of the following epithelial tissues forms the inner lining of blood vessels ? (a) Cuboidal epithelium (b) Columnar epithelium (c) Ciliated epithelium (d) Squamous epithelium
[1]
Page 2 of 11
Q19.
In earthworm, locomotion is assisted by which of the following ? (a) Parapodia (b) Setae (c) Pseudopodia (d) Cilia
[1]
Q20.
Which part of the cockroach contains the reproductive organ ? (a) Head (b) Thorax (c) Abdomen (d) Antenna
[1]
Q21.
Which of the following is found only in a plant cell ? (a) Nucleus (b) Ribosome (c) Plastid (d) Mitochondria
[1]
Q22.
The function of golgi apparatus is (a) Protein synthesis (b) Respiration (c) Modification and packaging (d) DNA storage
[1]
Q23.
What is the function of nucleolus ? (a) Lipid synthesis (b) DNA replication (c) Ribosomal RNA synthesis (d) ATP production
[1]
Q24.
Which of the following is a double membrane-bound organelle ? (a) Lysosome (b) Golgi apparatus (c) Mitochondria (d) Ribosome
[1]
Q25.
Enzymes are chemically (a) Lipids (b) Carbohydrates (c) Proteins (d) Nucleic acids
[1]
Q26.
Which of the following vitamins is fat soluble ? (a) Vitamin B (b) Vitamin C (c) Vitamin B12 (d) Vitamin D
[1]
Q27.
Nucleotides are made up of which of the following ? (a) Sugar and base (b) Sugar and phosphate (c) Sugar, phosphate and nitrogenous base (d) Base and phosphate
[1]
Q28.
Which test is used to detect the presence of proteins ? (a) Benedict's test (b) Biuret test (c) Fehling's test (d) Iodine test
[1]
Q29.
Interphase is the phase of which of the following ? (a) Nuclear division (b) Chromosome segregation (c) Preparation for cell division (d) Cytoplasmic division
[1]
Page 3 of 11
Q30.
Crossing over occurs during which phase of meiosis ? (a) Zygotene (b) Pachytene (c) Diplotene (d) Diakinesis
[1]
Q31.
In which stage of the cell cycle does DNA replication occur ? (a) G1 phase (b) G2 phase (c) M phase (d) S phase
[1]
Q32.
The oxygen released during photosynthesis comes from (a) Carbon dioxide (b) Glucose (c) Water (d) Chlorophyll
[1]
Q33.
Which scientist discovered the law of limiting factors in photosynthesis ? (a) Blackman (b) Hill (c) Engelmann (d) Calvin
[1]
Q34.
RuBisCO enzyme takes part in which of the following ? (a) Photolysis of water (b) Electron transport (c) CO2 fixation in Calvin cycle (d) ATP synthesis
[1]
Q35.
Hill reaction occurs in which part of the chloroplast ? (a) Stroma (b) Inner membrane (c) Grana (d) Outer membrane
[1]
Q36.
What is the site of glycolysis in a cell ? (a) Mitochondria (b) Cytoplasm (c) Nucleus (d) Chloroplast
[1]
Q37.
The number of ATP molecules produced by complete oxidation of one glucose molecule is (a) 2 (b) 18 (c) 36 (d) 38
[1]
Q38.
Anaerobic respiration in muscles produces (a) Ethanol (b) Lactic acid (c) Acetic acid (d) Pyruvate
[1]
Q39.
Which of the following processes does not occur in mitochondria ? (a) Krebs cycle (b) Glycolysis (c) Electron transport chain (d) Oxidative phosphorylation
[1]
Q40.
Which of the following is a natural plant hormone ? (a) NAA (b) 2, 4-D (c) IAA (d) Ethylene glycol
[1]
Page 4 of 11
Q41.
Which plant hormone is responsible for cell elongation ? (a) Cytokinin (b) Auxin (c) Abscisic acid (d) Ethylene
[1]
Q42.
Photoperiodism (of plants) is the biological response to which of the following ? (a) Soil nutrients (b) Light duration (c) Temperature (d) Humidity
[1]
Q43.
Vernalisation refers to (a) Growth due to light (b) Growth due to gravity (c) Induction of flowering by cold (d) Seed dormancy
[1]
Q44.
Which part of the brain regulates respiration ? (a) Cerebellum (b) Cerebrum (c) Medulla oblongata (d) Hypothalamus
[1]
Q45.
The normal breathing rate in a healthy adult is (a) 10-12 breaths/min (b) 12-16 breaths/min (c) 20-25 breaths/min (d) 25-30 breaths/min
[1]
Q46.
During inspiration, the diaphragm (a) Relaxes (b) Contracts and moves downwards (c) Moves upwards (d) Becomes dome-shaped
[1]
Q47.
Which of the following is a respiratory pigment ? (a) Myosin (b) Haemoglobin (c) Chlorophyll (d) Albumin
[1]
Q48.
Which factor mainly regulates the rate of breathing ? (a) O2 concentration (b) CO2 concentration (c) N2 level (d) Glucose level
[1]
Q49.
Which blood cells in the following are responsible for clotting ? (a) RBCs (b) WBCs (c) Platelets (d) Neutrophils
[1]
Q50.
The average tidal volume in a healthy adult is (a) 1000 ml (b) 500 ml (c) 1500 ml (d) 250 ml
[1]
Q51.
The volume of air remaining in lungs even after forceful expiration is called (a) Tidal volume (b) Residual volume (c) Expiratory reserve volume (d) Vital capacity
[1]
Page 5 of 11
Q52.
Lymph is different from blood as it lacks (a) WBC (b) Plasma (c) RBC (d) Protein
[1]
Q53.
The instrument used to measure blood pressure is (a) Stethoscope (b) Thermometer (c) Sphygmomanometer (d) ECG machine
[1]
Q54.
Which part of the heart has the thickest muscular wall ? (a) Right atrium (b) Left atrium (c) Right ventricle (d) Left ventricle
[1]
Q55.
Which artery carries deoxygenated blood ? (a) Pulmonary artery (b) Aorta (c) Renal artery (d) Coronary artery
[1]
Q56.
Uricotelic animals excrete (a) Ammonia (b) Urea (c) Uric acid (d) Creatinine
[1]
Q57.
The presence of glucose in urine is termed as (a) Glycosuria (b) Uremia (c) Ketonuria (d) Hematuria
[1]
Q58.
Which hormone regulates water reabsorption in kidneys ? (a) Aldosterone (b) Insulin (c) Vasopressin (d) Oxytocin
[1]
Q59.
Which part of the nephron is responsible for filtration of blood ? (a) Henle's loop (b) Bowman's capsule (c) Distal tubule (d) Collecting duct
[1]
Q60.
Which protein is responsible for muscle contraction ? (a) Keratin (b) Myosin (c) Elastin (d) Collagen
[1]
Q61.
Which type of muscle is involuntary and found in internal organs ? (a) Skeletal muscle (b) Biceps muscles (c) Smooth muscle (d) None of these
[1]
Q62.
Which of the following is not a hinge joint ? (a) Elbow joint (b) Knee joint (c) Shoulder joint (d) Ankle joint
[1]
Page 6 of 11
Q63.
Which ion is essential for transmission of nerve impulse ? (a) Sodium (b) Potassium (c) Iron (d) Both (A) and (B)
[1]
Q64.
Reflex actions are controlled by which of the following ? (a) Brain (b) Cerebellum (c) Spinal cord (d) Medulla
[1]
Q65.
What is the outermost layer of the brain ? (a) Medulla (b) Cerebral cortex (c) Pons (d) Midbrain
[1]
Q66.
Which part of the brain regulates body temperature ? (a) Cerebellum (b) Cerebrum (c) Hypothalamus (d) Medulla
[1]
Q67.
The master gland of the endocrine system is (a) Thyroid gland (b) Adrenal gland (c) Pituitary gland (d) Pancreas
[1]
Q68.
Which of the following glands is both endocrine and exocrine ? (a) Pituitary (b) Thyroid (c) Pancreas (d) Adrenal
[1]
Q69.
Iodine deficiency causes (a) Diabetes (b) Goitre (c) Rickets (d) Obesity
[1]
Q70.
Parathyroid hormone regulates the level of which of the following ? (a) Glucose (b) Calcium (c) Iron (d) Sodium
[1]
Section B

Q1.
What are lichens ? Mention their significance.
[2]
Q2.
Write two differences between bryophytes and pteridophytes.
[2]
Page 7 of 11
Q3.
Write down the main characteristics of phylum cordata.
[2]
Q4.
What is inflorescence ? Write its two types.
[2]
Q5.
Write the constituents and functions of phloem.
[2]
Q6.
What is the role of connective tissue in the body ?
[2]
Q7.
Write two differences between prokaryotic and eukaryotic cells.
[2]
Q8.
Write the names of different components of a nucleotide.
[2]
Q9.
What are the four stages of mitotic division ?
[2]
Q10.
Write the names of the pigments that take part in photosynthesis.
[2]
Q11.
What is respiratory quotient ?
[2]
Page 8 of 11
Q12.
Differentiate between tap root system and fibrous root system.
[2]
Q13.
What is photoperiodism in plants ?
[2]
Q14.
Define vital capacity. What is its significance ?
[2]
Q15.
What are the flight adaptations in birds ?
[2]
Q16.
What is the role of nephron in kidney ?
[2]
Q17.
Briefly describe myasthenia gravis.
[2]
Q18.
Write two differences between endocrine and exocrine glands.
[2]
Q19.
Write the names and functions of two hormones secreted by pituitary gland.
[2]
Q20.
Write the names of two hormones secreted by kidney.
[2]
Page 9 of 11
Section C

Q1.
Write the characteristics of phylum arthropoda. Give suitable examples.
[5]
Q2.
Define photosynthesis. What is the role of chloroplast in it ?
[5]
Q3.
What is nephron ? Describe the structure of a nephron with a diagram.
[5]
Q4.
Describe the structure and functions of human eye with the help of a diagram.
[5]
Q5.
Describe the structure and functions of mitochondria.
[5]
Page 10 of 11
Q6.
Define tissue. Describe the classification of meristematic tissue.
[5]
Page 11 of 11