Bihar Board Class 10 · Science · Matric exam 2027
Chapter 6: Life Processes
This chapter’s questions from Bihar Board (BSEB)’s real papers of 2021–2026 — the 20 asked most often, 3 with the full model answer, 17 with how the answer begins — and objective questions with the board’s key. All 51 questions of this chapter, with answers, are in the app.
- marks a year (about)
- 12
- questions a year (about)
- 17
- rank in Science
- #1
From 6 years of papers, 2021–2026 · full chapter-wise marks
VVI questions — the ones the board asked most (20)
- Q1Short answer2 marksAsked: 2021, 2025
Define respiration.
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Model answer · definition, respiration
- 1.Respiration is the process in which glucose, a six-carbon molecule, is broken down within the cell through oxidising-reducing reactions, using oxygen taken from outside the body, to release energy for the various molecular movements needed by the organism.1 mark
- 2.In this process, carbon dioxide and water are produced as end products, and the energy released during respiration is used to synthesise ATP from ADP and inorganic phosphate, which acts as the energy currency to drive other activities in the cell.1 mark
- Write that glucose is oxidised within the cell to release energy using oxygen from outside the body
- State both end products: carbon dioxide and water
- Mention ATP as the energy currency formed from ADP and inorganic phosphate
Marks split from a structure derived from past papers (checked twice); not Bihar Board’s official scheme
- Q2Short answer2 marksAsked: 2021, 2025
Write four main characteristics of living beings.
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Model answer · characteristics of living beings
- 1.Living organisms undergo the process of nutrition to obtain energy. The food eaten gives the energy and raw material needed to maintain the body and to grow.0.5 marks
- 2.Living organisms take in oxygen and release carbon dioxide through respiration. The process of acquiring oxygen from outside the body and using it to break down food sources for cellular needs is respiration.0.5 marks
- 3.Living organisms have the ability to grow and develop. The body size of the organism increases as additional raw material is taken in from outside.0.5 marks
- 4.Living organisms reproduce to produce new individuals like themselves. Reproduction is the process by which organisms give rise to offspring similar to themselves.0.5 marks
- Write the words 'nutrition' and 'energy' together in the first point.
- Use the exact phrase 'respiration' and mention oxygen and carbon dioxide in the second point.
- Mention 'grow' or 'growth' and 'reproduce' or 'reproduction' clearly as separate points.
Marks split from a structure derived from past papers (checked twice); not Bihar Board’s official scheme
- Q3Short answer2 marksAsked: 2021, 2023
What is villi ? Write its function.
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Model answer · villi, small intestine
- 1.The inner lining of the small intestine has numerous finger-like projections called villi.1 mark
- 2.Villi increase the surface area for the absorption of digested food.1 mark
- Write "finger-like projections" and "small intestine" together in the first line.
- Write "surface area" and "absorption" together in the second line.
Marks split from a structure derived from past papers (checked twice); not Bihar Board’s official scheme
- Q4Long answer5 marksAsked: 2021
Describe the process of photosynthesis in plant with the help of labelled diagram.
How the model answer begins
1. Photosynthesis is the process by which autotrophs take in substances from the outside and convert them into stored forms of energy. Green plants make their own food in the form of carbohydrates by taking in carbon…
The full answer from Medha Ma’am → - Q5Long answer5 marksAsked: 2021
How does the transportation of oxygen and carbon dioxide take place in human being?
How the model answer begins
1. In human beings, the respiratory pigment is haemoglobin which has a very high affinity for oxygen, and this pigment is present in the red blood corpuscles. In the lungs, the passage divides into smaller and smaller…
The full answer from Medha Ma’am → - Q6Long answer5 marksAsked: 2024
Draw a labelled diagram of human digestive system and explain the digestive process of food.
How the model answer begins
1. The human digestive system consists of the alimentary canal, which is basically a long tube extending from the mouth to the anus, along with associated glands. The diagram given below shows the mouth, oesophagus…
The full answer from Medha Ma’am → - Q7Long answer5 marksAsked: 2025
What is photosynthesis ? Describe it with a suitable diagram.
How the model answer begins
1. Photosynthesis is the process by which green plants make their own food (glucose) using carbon dioxide and water in the presence of sunlight and chlorophyll. The plant takes up carbon dioxide from the air and water from…
The full answer from Medha Ma’am → - Q8Long answer5 marksAsked: 2025
Draw a neat labelled diagram of the respiratory organs of human being. (Description is not required)
How the model answer begins
1. A neat and clean labelled diagram of the human respiratory system is drawn below, showing air taken in through the nostrils, passing through the throat into the lungs, where the passage divides into smaller and smaller…
The full answer from Medha Ma’am → - Q9Long answer5 marksAsked: 2025
Write the functions of liver.
How the model answer begins
1. The liver secretes bile juice which helps in the emulsification of fats. Fats are present in the intestine in the form of large globules which makes it difficult for enzymes to act on them. Bile salts break them down…
The full answer from Medha Ma’am → - Q10Long answer5 marksAsked: 2026
What is nutrition ? Describe the different modes of nutrition found in living organisms.
How the model answer begins
1. Nutrition is the process by which organisms take in food and utilize it for obtaining energy and body growth. Food is the source of energy and of the materials the body needs to grow, develop and synthesise protein.…
The full answer from Medha Ma’am → - Q11Long answer5 marksAsked: 2023
Describe the process of respiration in human.
How the model answer begins
1. During respiration, air is taken into the body through the nostrils. The air passing through the nostrils is filtered by fine hairs that line the passage. The passage is also lined with mucus which helps in this…
The full answer from Medha Ma’am → - Q12Long answer5 marksAsked: 2022
What is an artificial kidney ? How does it work ?
How the model answer begins
1. An artificial kidney is a device to remove nitrogenous waste products from the blood through dialysis. It is used in case of kidney failure, when kidneys are unable to remove the poisonous nitrogenous wastes from the…
The full answer from Medha Ma’am → - Q13Long answer5 marksAsked: 2025
What is photosynthesis ? Describe it with a suitable diagram.
How the model answer begins
1. Photosynthesis is the process by which autotrophs take in substances from the outside, in the form of carbon dioxide and water, and convert them into carbohydrates in the presence of sunlight and chlorophyll. This…
The full answer from Medha Ma’am → - Q14Short answer2 marksAsked: 2021
What is bile? What is the significance of bile in human digestion?
How the model answer begins
1. Bile is a thick, green-yellow alkaline fluid secreted by the liver and stored in the gallbladder.
The full answer from Medha Ma’am → - Q15Short answer2 marksAsked: 2021
What is lymph? Explain its functions.
How the model answer begins
1. Lymph is a colorless fluid that filters out from blood plasma into the intercellular spaces present in between the cells of body tissues.
The full answer from Medha Ma’am → - Q16Short answer2 marksAsked: 2021
How many types of teeth are there in human? Write their names and functions.
How the model answer begins
1. There are four types of teeth in humans.
The full answer from Medha Ma’am → - Q17Short answer2 marksAsked: 2021
Write the differences between transpiration and translocation.
How the model answer begins
1. Transpiration is the process of loss of water in the form of vapour from the aerial parts of plants.
The full answer from Medha Ma’am → - Q18Short answer2 marksAsked: 2024
Explore the difference between blood and lymph.
How the model answer begins
1. Blood is a red coloured fluid connective tissue which contains haemoglobin. It consists of a fluid medium called plasma in which the cells are suspended, and it transports food, oxygen, carbon dioxide and nitrogenous…
The full answer from Medha Ma’am → - Q19Short answer2 marksAsked: 2024
What is external respiration ?
How the model answer begins
1. External respiration is the process in which organisms take in oxygen from the environment and release carbon dioxide. Terrestrial animals breathe the oxygen present in the atmosphere, while aquatic animals use the…
The full answer from Medha Ma’am → - Q20Short answer2 marksAsked: 2024
Why do we sweat in summer ?
How the model answer begins
1. We sweat in summer because the sweat glands present in our skin become active when the body temperature rises during hot days. This happens because the body needs to prevent excessive rise of body temperature, so the…
The full answer from Medha Ma’am →
31 more questions of this chapter, each with its model answer, in the AskMedha app.
Objective questions with the board’s key (10)
- 1. Bihar Board 2026
Which of the following is not required for autotrophic nutrition ?
- (A) CO2 and water
- (B) Chlorophyll
- (C) Sunlight
- (D) Oxygen ✓
Answer: (D)
- 2. Bihar Board 2026
Which nutrient is digested in the oral cavity ?
- (A) Protein
- (B) Carbohydrate ✓
- (C) Fat
- (D) Nucleic acid
Answer: (B)
- 3. Bihar Board 2026
The longest part of the human alimentary canal is
- (A) Stomach
- (B) Oesophagus
- (C) Large intestine
- (D) Small intestine ✓
Answer: (D)
- 4. Bihar Board 2026
Which wall of guard cell of dicotyledonous plants is thick ?
- (A) Inner ✓
- (B) External
- (C) Lateral
- (D) None of these
Answer: (A)
- 5. Bihar Board 2026
Where does glycolysis occur ?
- (A) Cytoplasm ✓
- (B) Mitochondria
- (C) Golgi complex
- (D) None of these
Answer: (A)
- 6. Bihar Board 2026
The main respiratory organ of fish is
- (A) Trachea
- (B) Lungs
- (C) Nose
- (D) Gills ✓
Answer: (D)
- 7. Bihar Board 2026
The human heart is surrounded by
- (A) connective tissue
- (B) perichondrium
- (C) mucosa
- (D) pericardium ✓
Answer: (D)
- 8. Bihar Board 2026
The colour of plasma is
- (A) green
- (B) red
- (C) light yellow ✓
- (D) none of these
Answer: (C)
- 9. Bihar Board 2026
Which of the following is water-conducting tissue in plants ?
- (A) Phloem
- (B) Sieve tube
- (C) Xylem ✓
- (D) None of these
Answer: (C)
- 10. Bihar Board 2026
Resin is the excretory product of which of the following plants ?
- (A) Pine ✓
- (B) Kaner
- (C) Banyan
- (D) None of these
Answer: (A)
Questions parents and students ask
- How many marks does "Life Processes" carry in Bihar Board Class 10 Science?
- In the Bihar Board papers of 2021–2026, this chapter carried about 12 marks and about 17 questions a year; by marks it ranks 1 in Science.
- Which are the most important (VVI) questions of "Life Processes"?
- The 20 questions above are from the board’s real papers, each with the years it was asked; the most-asked come first with their full model answers. All 51 written questions of this chapter, with answers, are in the AskMedha app.
- Do the answers follow the board’s marking scheme?
- BSEB does not publish a marking scheme. Each answer is written point by point on a structure derived from past papers and checked by a second, independent model; it is never called the board’s official scheme.
The same preparation, with Medha Ma’am — on your phone
Every question of every chapter with its model answer, practice questions in the board’s own shapes, 60 minutes of class a day, written answers marked, a test every Sunday and a WhatsApp report to parents.
Medha Ma’am is an AI teacher, not a live tutor. Every answer is checked twice; a person takes responsibility.