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Punjab (PTB) · 10th Class Biology paper scheme (Punjab boards) · Free

10th Class Biology Board Pattern Paper 2026

60 marks · About 2 hours (objective and subjective) · 39 questions. Covers: 10 chapters (CHAP 1: HUMAN DIGESTIVE SYSTEM to CHAP 10: EVOLUTION).

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10th Class Biology Board Pattern Paper 2026

10th Class · Biology · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 60Time: About 2 hours (objective and subjective)

Q1. Multiple choice questions (Attempt all · 12 × 1 = 12)

  1. What is the function of a crosome?

    1. Guides the sperm towards egg cell

    2. Releases enzymes that help sperm penetrate the egg's outer layers

    3. Activates the egg for fertilization

    4. Helps in the fusion of sperm and egg nuclei

  2. If farmers mostly grow GM crops, traditional and naturally diverse varieties might become ......

    1. Common and cheap

    2. Stronger and healthier

    3. Rare

    4. Poisonous

  3. In the beetle example, why are brown beetles more likely to survive than green beetles?

    1. They can fly faster

    2. They blend in with the soil better to hide from birds

    3. They eat less food

    4. They are immune to diseases

  4. Which nitrogenous base is found in RNA instead of the thymine found in DNA?

    1. Adenine

    2. Cytosine

    3. Uracil

    4. Guanine

  5. The mode of transmission for Escherichia coli is:

    1. Air droplets

    2. Skin contact

    3. Contaminated food or water

    4. Mosquito bite

  6. Regular handwashing and avoiding contaminated water help prevent:

    1. Diarrhoea

    2. Constipation

    3. Diabetes

    4. Genetic disorders

  7. In central Nervous system (CNS) myelinated axons form:

    1. Grey malter

    2. White matter

    3. Neuroglia

    4. Dendrites

  8. Capillaries are the smallest blood vessels, and their walls are made of only a single layer of cells called ...... 

    1. Connective tissue

    2. Smooth muscle

    3. Endothelium

    4. Pericardium

  9. What is the major dietry cause of kidney stones?

    1. Eating too much fruit

    2. Eating green vegetables and dairy products

    3. Drinking too much water

    4. Lack of salt in food

  10. Nicotine and other chemicals in vapes increase which cardiovascular factors?

    1. Heart rate and blood pressure

    2. Blood volume only

    3. Red blood cells

    4. Oxygen levels

  11. Following are the parts of male reproductive system except:

    1. Testes

    2. Penis

    3. Epididymis

    4. Cervix

  12. In genetic engineering, "recombinant DNA" means:

    1. Natural DNA

    2. DNA copied by mistake

    3. DNA joined from two sources

    4. DNA destroyed by enzymes 

Q2. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. Where is the liver found in the human body?

  2. Write the disadvantages of vaping.

  3. Why does oxygenated and deoxygenated blood not mix in the human heart?

  4. How do kidneys conserve water when the body faces a shortage of water?

  5. Write a brief note on the structure of villi.

  6. What is the role of intercostal muscles during exhalation?

  7. Explain how the "lubb" and "dubb" sounds of the heart are produced.

  8. How do kidneys help in maintaining homeostasis in the body?

Q3. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. What do you know about synapse and neurotransmitter?

  2. What is the role of FSH in males?

  3. Discuss the role of yeast in making bread.

  4. Differentiate between a Chromatid and a Centromere.

  5. Differentiate medulla oblongata, cerebellum and pons on the basis of their functions

  6. Complete the chart of oogenesis by mentioning the names of cells and number of chromosomes (2n or 1n).

  7. Why are bacteria essential microorganisms in biotechnology?

  8. Define monohybrid cross and a dihybrid cross and give an example of each.

Q4. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. How many basic types of diseases are there? Name them.

  2. Why palaeontologists study fossils?

  3. Define the term 'Allergy'.

  4. Which are the main sources of variations?

  5. How do humans contract Aspergillosis?

  6. Explain how the food sources on the Galapagos Islands affected the finches.

  7. Write a note yellow fever.

  8. What is species?

Q5. Long questions (Attempt any 2 of 3 · 2 × 9 = 18)

  1. Describe the structure of a neuron and support your answer with a labelled diagram.

  2. Why is it important to maintain a healthy balance of gut bacteria?

  3. What is meant by sexually transmitted diseases? Explain.