Class 10 Science Life Processes
Class 10 Science Life Processes Fill in the blanks , Multiple Choice Question [mcq] and True false .
Fill in the Blanks
1. The process of breaking down food to release energy is called ________.
Answer: respiration
2. Green plants prepare their food through the process of ________.
Answer: photosynthesis
3. The tiny pores on leaves for gas exchange are called ________.
Answer: stomata
4. The energy currency of the cell is ________.
Answer: ATP
5. The pigment responsible for photosynthesis in plants is ________.
Answer: chlorophyll
6. The muscular organ that pumps blood in humans is the ________.
Answer: heart
7. The blood vessels that carry oxygen-rich blood away from the heart are called ________.
Answer: arteries
8. The process of removing waste from the body is called ________.
Answer: excretion
9. The functional unit of the kidney is the ________.
Answer: nephron
10. The transport of food in plants occurs through ________.
Answer: phloem
11. The breakdown of glucose in the absence of oxygen is called ________ respiration.
Answer: anaerobic
12. The enzyme in saliva that breaks down starch is ________.
Answer: salivary amylase
13. The part of the digestive system where most nutrient absorption occurs is the ________.
Answer: small intestine
14. The gas released during photosynthesis is ________.
Answer: oxygen
15. The process of water movement in plants is called ________.
Answer: transpiration
Multiple Choice Questions (MCQs)
1. What is the primary function of xylem in plants?
a) Transport of food
b) Transport of water
c) Transport of oxygen
d) Transport of hormones
Answer: b) Transport of water
2. Which organelle is known as the “powerhouse of the cell”?
a) Nucleus
b) Mitochondria
c) Chloroplast
d) Ribosome
Answer: b) Mitochondria
3. What is the main waste product excreted by human kidneys?
a) Oxygen
b) Urea
c) Glucose
d) Carbon dioxide
Answer: b) Urea
4. Which gas is taken in by plants during photosynthesis?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Hydrogen
Answer: c) Carbon dioxide
5. Where does digestion of proteins begin in humans?
a) Mouth
b) Stomach
c) Small intestine
d) Large intestine
Answer: b) Stomach
6. What is the role of haemoglobin in blood?
a) Digestion of food
b) Transport of oxygen
c) Production of hormones
d) Storage of fat
Answer: b) Transport of oxygen
7. Which process releases the most energy from glucose?
a) Anaerobic respiration
b) Aerobic respiration
c) Fermentation
d) Photosynthesis
Answer: b) Aerobic respiration
8. What is the function of guard cells in plants?
a) Transport water
b) Control stomatal opening
c) Store food
d) Absorb sunlight
Answer: b) Control stomatal opening
9. Which part of the human respiratory system contains alveoli?
a) Trachea
b) Bronchi
c) Lungs
d) Diaphragm
Answer: c) Lungs
10. What is the main function of platelets in blood?
a) Carry oxygen
b) Fight infections
c) Clot blood
d) Transport nutrients
Answer: c) Clot blood
11. Which of the following is NOT a life process?
a) Reproduction
b) Excretion
c) Respiration
d) Combustion
Answer: d) Combustion
12. Bile is produced by which organ?
a) Pancreas
b) Liver
c) Stomach
d) Kidney
Answer: b) Liver
13. What is the main function of the phloem?
a) Transport water
b) Transport food
c) Provide support
d) Store waste
Answer: b) Transport food
14. Which of these is a parasitic plant?
a) Cuscuta
b) Rose
c) Grass
d) Mango
Answer: a) Cuscuta
15. What is the normal range of human blood pressure?
a) 80/120 mmHg
b) 120/80 mmHg
c) 100/60 mmHg
d) 140/90 mmHg
Answer: b) 120/80 mmHg
True/False Questions
1. Plants perform respiration only during the night. Answer: False
2. The small intestine is the main site of nutrient absorption in humans. Answer: True
3. Anaerobic respiration produces more energy than aerobic respiration. Answer: False
4. Haemoglobin is present in red blood cells. Answer: True
5. Xylem transports food in plants. Answer: False
6. The human heart has four chambers. Answer: True
7. Stomata help in the exchange of gases in plants. Answer: True
8. Veins carry oxygen-rich blood towards the heart. Answer: False
9. The kidneys filter waste from the blood. Answer: True
10. Transpiration occurs only in leaves. Answer: False
11. Fungi are autotrophs. Answer: False
12. Saliva contains enzymes to digest starch. Answer: True
13. Carbon dioxide is a by-product of photosynthesis. Answer: False
14. The alveoli increase the surface area for gas exchange in lungs. Answer: True
15. Platelets help in blood clotting. Answer: True
