ICSE Board conducted the Class 10 Biology (Science Paper 3) Board Exam 2026 on March 13, 2026. Class 10 Biology (Science Paper 3) Question Paper with Solution PDF is available here for download.
The ICSE Board Class 10 Biology (Science Paper 3) covered key topics from practical applications of biology, experiments, and observations in plant and animal physiology. The exam is marked out of 100, with 15 marks for MCQs, 65 for descriptive questions, and 20 for practical applications and internal assessments.
ICSE Board Class 10 2026 Biology (Science Paper 3) Question Paper with Solution PDF
| ICSE Board Class 10 Biology (Science Paper 3) Question Paper 2026 | Download PDF | Check Solution |
Four friends P, Q, R, and S were discussing the examples of genetic disorders. The examples they quoted were as follows:
P. Colour blindness and Malaria
Q. Albinism and Cholera
R. Haemophilia and Colour blindness
S. Haemophilia and Albinism
Who gave the correct examples?
During the ventricular systole, the atrioventricular valves (P) _____ and the semilunar valves (Q) ______ .
Assertion (A): A thick cuticle reduces transpiration by acting as a barrier.
Reason (R): Desert plants have large, thin leaves for transpiration.
A sequence of DNA has 300 nitrogenous base pairs, of which 75 are Guanine. What is the number of Thymine in this sequence?
Assertion (A): Abscisic acid promotes stomatal closure during a drought.
Reason (R): Abscisic acid helps the plant to conserve water during stress.
Assertion (A): Leukoderma is the biological term for blood cancer.
Reason (R): An abnormal increase in the number of WBCs causes blood cancer.
A health organisation wants to educate the rural audience about population control using visually engaging methods. Which of these would be effective?
P. Posters
Q. Loudspeakers
R. Film shows
S. Street plays
A family has a history of colour blindness. During a genetic testing, it was found that the mother is a carrier of colour blindness (X^C X) and the father has normal vision (XY). What is the probability of their sons being colour blind?
Bharat woke up late in the morning and missed the school bus.
This situation stimulated the nerves of the sympathetic system which resulted in:
Which is the correct sequence of blood flow in the Pulmonary and Systemic Circulation?
Karan was standing on a high stool and cleaning the ceiling fan.
He suddenly loses balance and sustains a head injury. An examination reveals that his pupils have lost the capacity to constrict in bright light. Which structure has been damaged?
A person suffering from kidney failure has proteins in the urine. What is this condition called?
What does Swachh Bharat Abhiyan aim to achieve in India?
Varun’s mother added plenty of salt to the mango pickle she made. This is to:
During which phase of the menstrual cycle does the endometrium shed?
The tropic movement wherein the tendrils of a pea plant twine around a support.
A defect in our eye in which some parts of the object are in focus while the other parts are blurred.
The type of waste generated in hospitals and pathological laboratories.
The surgical technique for females that can be used to prevent pregnancy.
The evolutionary process by which new species arise from the existing ones.
Given below is the diagram of a human sperm. Read the information below the diagram and fill in the blanks:
Choose the odd one out from the following terms and name the category to which the others belong:
Mohit, a 30-year-old man was a software professional leading a sedentary life. He showed signs of high blood sugar during a routine health check-up despite having a normal body weight.
The hormonal disorder he is suffering from.
The hormone responsible for this disorder.
The organ that secretes this hormone.
Study the diagram given below and match the structure with its functions:
Which is the resting but metabolically active stage of the cell cycle?
Given below is the picture of an eagle.
Draw a neat, labelled diagram of an animal cell showing the Prophase stage of Mitosis with four chromosomes.
What is the scientific name of modern man?
How are the Cytons and Axons of neurons arranged in the following?
(a) Cerebrum
(b) Spinal Cord
Who proposed the theory of Natural Selection?
Name the organism which was used as an example to explain Industrial Melanism.
Differentiate between Plasmolysis and Deplasmolysis.
Akshay's father had a tumour in his prostate gland. His doctor advised him to get it removed surgically. One side effect of the surgery was incontinence of urine, i.e. leakage of urine from the urinary bladder.
RBCs do not have nuclei. Discuss its advantage.
Arrange the following food chains in a proper sequence.
Small fish, Algae, Mosquito larvae, Kingfisher
A 28-year-old pregnant lady goes to a gynecologist for a check-up. Her doctor explains that there is normal growth of the foetus and the placenta is functioning well.
Mention any two secondary sexual characteristics in a 15-year-old boy.
Tara's grandmother is 70 years old and has a passion for embroidery. She faces difficulty in threading the needle as the eye of the needle appears blurred. The ophthalmologist diagnosed it as an age-related disorder.
(a) Name the eye disorder she is suffering from.
(b) How can the above defect be corrected?
(c) Where is the image formed in the above disorder?
Explain the term 'Population Density' with reference to human beings.
A 17-year-old girl was having irregular menstrual cycle. Her mother took her to their family physician. She was diagnosed with Adrenal Virilism. Study the picture given below and answer the following questions.
(a) Hypersecretion of which hormone results in Adrenal Virilism in human females?
(b) Mention one symptom of this disorder.
Differentiate between Mitosis in plant cell and animal cell based on Cytokinesis.
Sara placed a healthy potted plant in a dark room for 48 hours to perform an experiment on photosynthesis. She plucked one of the leaves and tested it for starch. The leaf did not turn blue-black on adding Iodine solution.
(a) Name the structure.
(b) Label Gray matter and White matter.
Copy the diagram given below.
(a) Name the structure.
(b) Label Gray matter and White matter.
Write the overall chemical equation for photosynthesis.
Expand the abbreviations:
(a) NADP
(b) ADP
Explain the term Synapse.
Name the neurotransmitter that allows the transmission of impulses across the synapse.
What is the role of the following?
(a) Leydig cells
Seminiferous tubules
"Vanishing Greenery; A Growing Urban Crisis"
In most of our cities, rapid urbanisation has led to a significant decrease in greenery over the past two decades. As the population increased, the demand for housing, roads and commercial buildings grew, leading to clearing of parks, gardens, and natural resources. This has contributed to several problems.
(a) Mention one significant problem caused by the reduction in urban greenery.
(b) How do green plants contribute to improving the air quality?
(c) What role can you, as a citizen, play in protecting urban greenery?
Name the fluid present between the meninges in spinal cord.
What is its function?
Given below is the diagram of a turgid plant cell.
Select and write the two biodegradable wastes from the given list:
Styrofoam, Metallic cans, Decaying fruits, Plastic bottles, Newspapers
Rajat Singh was working as a supervisor in a stone quarry where rock, sand and gravel are extracted by techniques like digging, drilling, and blasting. As the years rolled by, Rajat started facing a loss in hearing. The high decibel sounds had damaged a part of his internal ear, though the tympanic membrane was intact.
(a) Give the collective term for the structure located in the internal ear.
(b) Name the sensory organ in the Cochlea which was damaged for Rajat
Singh.
(c) What kind of pollution do the workers face in the stone quarry?
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