WORKSHEET – CHAPTER 5: LIFE PROCESSES

SECTION A – MULTIPLE CHOICE QUESTIONS (20 MCQs)

  1. The process of removal of waste products from the body is called:
     a) Nutrition
     b) Respiration
     c) Excretion
     d) Digestion

  2. The inner lining of small intestine has:
     a) Villi
     b) Cilia
     c) Alveoli
     d) Nephrons

  3. The ultimate end products of photosynthesis are:
     a) CO₂ and water
     b) Glucose and oxygen
     c) Glucose and nitrogen
     d) Water and oxygen

  4. The site of complete digestion in humans is:
     a) Stomach
     b) Mouth
     c) Small intestine
     d) Large intestine

  5. Haemoglobin is present in:
     a) Platelets
     b) Plasma
     c) RBC
     d) WBC

  6. In plants, the transport of food occurs through:
     a) Xylem
     b) Phloem
     c) Stomata
     d) Cortex

  7. The process by which green plants prepare food is called:
     a) Respiration
     b) Transpiration
     c) Photosynthesis
     d) Germination

  8. The tube which carries urine from kidneys to urinary bladder is:
     a) Urethra
     b) Ureter
     c) Nephron
     d) Duct

  9. Which enzyme is present in saliva?
     a) Pepsin
     b) Trypsin
     c) Ptyalin
     d) Lipase

  10. The functional unit of kidney is:
     a) Neuron
     b) Nephron
     c) Alveolus
     d) Glomerulus

  11. Exchange of gases in humans occurs in:
     a) Trachea
     b) Bronchi
     c) Alveoli
     d) Rib cage

  12. ATP is:
     a) Energy currency of cell
     b) Nitrogenous base
     c) Protein
     d) Enzyme

  13. Which process in plants requires energy?
     a) Transpiration
     b) Translocation
     c) Absorption of water
     d) Osmosis

  14. The opening and closing of stomata is controlled by:
     a) Guard cells
     b) Xylem
     c) Phloem
     d) Lenticels

  15. Which among the following is an autotroph?
     a) Mushroom
     b) Amoeba
     c) Green plant
     d) Paramecium

  16. Fat digestion occurs in:
     a) Mouth
     b) Stomach
     c) Small intestine
     d) Liver

  17. Plants lose water through:
     a) Respiration
     b) Transpiration
     c) Osmosis
     d) Diffusion

  18. Pulse is defined as:
     a) Contraction of heart
     b) Expansion of arteries
     c) Flow of blood in veins
     d) Function of kidney

  19. Which part filters blood first in nephron?
     a) Loop of Henle
     b) Glomerulus
     c) Ureter
     d) Tubule

  20. Oxygenated blood is carried by:
     a) Veins
     b) Arteries
     c) Lymph
     d) Capillaries

SECTION B – ASSERTION & REASON (10 Questions)

  1. A: Transpiration helps in cooling of plant.
     R: Water absorbs heat during evaporation.

  2. A: Xylem transports water upward.
     R: Xylem transport requires ATP.

  3. A: Photosynthesis takes place in chloroplast.
     R: Chloroplast contains chlorophyll pigment.

  4. A: Veins have valves.
     R: Valves prevent backflow of blood.

  5. A: Nephrons filter blood in kidneys.
     R: Glomerulus has thin, permeable walls.

  6. A: Pepsin digests protein.
     R: Pepsin works in acidic medium.

  7. A: Diaphragm plays major role in breathing.
     R: Diaphragm contracts during inhalation.

  8. A: Movement of food in phloem is bidirectional.
     R: Food moves from source to sink.

  9. A: RBC is red in colour.
     R: It contains haemoglobin.

  10. A: Fishes use gills for breathing.
     R: Gills help in gaseous exchange in water.

SECTION C – ONE-WORD / VERY SHORT ANSWERS (10)

  1. Define nutrition.
  2. What is peristalsis?
  3. Write the equation for photosynthesis.
  4. Name the respiratory pigment in humans.
  5. What are stomata?
  6. What is the main function of nephrons?
  7. State the function of bile juice.
  8. What is lymph?
  9. Define transpiration.
  10. What is emulsification?

SECTION D – SHORT ANSWER QUESTIONS (8)

  1. Explain the role of villi in nutrition.
  2. Why is the small intestine very long in herbivores?
  3. Describe the process of double circulation.
  4. Explain the mechanism of breathing in humans.
  5. How is urine formed in the kidneys?
  6. Differentiate between xylem and phloem.
  7. Explain how transpiration helps in upward movement of water.
  8. Draw a labelled diagram of nephron. (text-based description allowed)

SECTION E – LONG ANSWER QUESTIONS (5)

Q1. (Nutrition – 5 Marks)

(a) Explain holozoic nutrition in humans.
 (b) Describe digestion in the mouth, stomach, and small intestine.
 (c) Draw a labelled diagram of human digestive system.
 (d) Explain two disorders related to digestive system.

Q2. (Respiration – 5 Marks)

(a) Differentiate between aerobic and anaerobic respiration.
 (b) Explain mechanism of breathing (inhalation + exhalation).
 (c) Draw and label the human respiratory system.
 (d) Why are alveoli considered the site for gaseous exchange?

Q3. (Transportation – 5 Marks)

Case: A boy suffers from low haemoglobin and swelling in leg tissues.

(a) Explain the role of haemoglobin in blood.
 (b) What is lymph and what role does it play?
 (c) Describe the structure and function of the human heart.
 (d) What is the difference between arteries and veins?

Q4. (Excretion – 5 Marks)

(a) Draw a labelled diagram of nephron.
 (b) Explain filtration, reabsorption, and urine formation.
 (c) Why is excretion important for homeostasis?
 (d) Explain the role of ADH hormone in urine formation.

Q5. (Plants – 5 Marks)

Case: A plant is kept in bright sunlight for 6 hours.

(a) Explain the process of photosynthesis.
 (b) Describe raw materials required and how they are obtained.
 (c) Draw a labelled diagram of stomata.
 (d) What happens to the rate of photosynthesis if CO₂ level increases?

 

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