Life Processes: Nutrition, Respiration, Transportation, Excretion
8 minFull explanation, worked examples & memory tricks in the app
Kit Library / Science / Biology
⚡ Topic Learning KitLife Processes
English 36 leveled MCQs Free
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All 36 questions, laddered from warm-up to topper-level, each with its answer and the reasoning behind it.
Warm-up · 19 questions
Q1. Which of the following is a raw material required for photosynthesis?
Beginner
A
Oxygen
B
Carbon dioxide
C
Nitrogen
D
Hydrogen
Answers and explanations are in the Veda app.
Q2. The site of photosynthesis in a plant cell is the:
Beginner
A
Mitochondria
B
Chloroplast
C
Nucleus
D
Ribosome
Answers and explanations are in the Veda app.
Q3. In human beings, the exchange of gases takes place in the:
Beginner
A
Bronchi
B
Diaphragm
C
Trachea
D
Alveoli
Answers and explanations are in the Veda app.
Q4. Which of the following is the functional unit of the kidney?
Beginner
A
Alveolus
B
Villus
C
Nephron
D
Neuron
Answers and explanations are in the Veda app.
Q5. The process of removal of harmful nitrogenous wastes from the body is called:
Beginner
A
Digestion
B
Respiration
C
Excretion
D
Transpiration
Answers and explanations are in the Veda app.
Q6. Which of the following is the largest artery in the human body?
Beginner
A
Renal artery
B
Pulmonary artery
C
Aorta
D
Coronary artery
Answers and explanations are in the Veda app.
Q7. Which of the following is NOT a part of the human digestive system?
Beginner
A
Stomach
B
Oesophagus
C
Small intestine
D
Trachea
Answers and explanations are in the Veda app.
Q8. Plants can perform both photosynthesis and respiration.
Beginner
A
True
B
False
Answers and explanations are in the Veda app.
Q9. The human heart is a four-chambered organ.
Beginner
A
True
B
False
Answers and explanations are in the Veda app.
Q10. What is the primary function of the digestive system?
Beginner
A
To exchange gases
B
To break down food
C
To remove waste
D
To circulate blood
Answers and explanations are in the Veda app.
Q11. Which of the following substances is primarily transported by the circulatory system?
Beginner
A
Carbon dioxide
B
Nutrients
C
Oxygen
D
Waste products
Answers and explanations are in the Veda app.
Q12. What is the main purpose of respiration in living organisms?
Beginner
A
To transport nutrients
B
To digest food
C
To produce energy
D
To excrete waste
Answers and explanations are in the Veda app.
Q13. Which organ is primarily responsible for excretion in humans?
Beginner
A
Kidney
B
Heart
C
Lungs
D
Liver
Answers and explanations are in the Veda app.
Q14. What is the process by which plants make their own food called?
Beginner
A
Respiration
B
Digestion
C
Transpiration
D
Photosynthesis
Answers and explanations are in the Veda app.
Q15. Which gas is a byproduct of aerobic respiration?
Beginner
A
Nitrogen
B
Oxygen
C
Hydrogen
D
Carbon dioxide
Answers and explanations are in the Veda app.
Q16. What is the main function of the vascular system in plants?
Beginner
A
To exchange gases
B
To transport water and nutrients
C
To store food
D
To perform photosynthesis
Answers and explanations are in the Veda app.
Q17. What is the term for the removal of waste products from the body?
Beginner
A
Absorption
B
Digestion
C
Excretion
D
Respiration
Answers and explanations are in the Veda app.
Q18. Which of the following is a component of the human respiratory system?
Beginner
A
Heart
B
Stomach
C
Kidneys
D
Lungs
Answers and explanations are in the Veda app.
Q19. Which nutrient is primarily responsible for providing energy to the body?
Beginner
A
Minerals
B
Vitamins
C
Carbohydrates
D
Proteins
Answers and explanations are in the Veda app.
Building up · 17 questions
Q20. Which of the following is an example of a parasitic plant?
Intermediate
A
Cuscuta
B
Sunflower
C
Venus flytrap
D
Pitcher plant
Answers and explanations are in the Veda app.
Q21. Which of the following is the correct pathway of air in humans?
Intermediate
A
Nostrils → Bronchi → Trachea → Alveoli
B
Nostrils → Trachea → Bronchi → Alveoli
C
Nostrils → Alveoli → Bronchi → Trachea
D
Nostrils → Trachea → Alveoli → Bronchi
Answers and explanations are in the Veda app.
Q22. The blood vessel that carries oxygenated blood from the lungs to the heart is:
Intermediate
A
Pulmonary vein
B
Vena cava
C
Aorta
D
Pulmonary artery
Answers and explanations are in the Veda app.
Q23. Which of the following is the correct equation for aerobic respiration?
Intermediate
A
$C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O$
B
$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$
C
$C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy}$
D
$C_6H_{12}O_6 \rightarrow 2C_2H_5OH + 2CO_2 + \text{energy}$
Answers and explanations are in the Veda app.
Q24. During anaerobic respiration in human muscles, glucose is converted into:
Intermediate
A
Pyruvate and water
B
Ethanol and CO$_2$
C
Lactic acid
D
Acetic acid
Answers and explanations are in the Veda app.
Q25. The process of transpiration in plants helps in:
Intermediate
A
Transport of food
B
Absorption of water
C
Upward movement of water and minerals
D
Photosynthesis
Answers and explanations are in the Veda app.
Q26. The enzyme present in saliva that breaks down starch into sugar is:
Intermediate
A
Lipase
B
Trypsin
C
Salivary amylase
D
Pepsin
Answers and explanations are in the Veda app.
Q27. Which of the following processes occurs in both plants and animals for energy production?
Intermediate
A
Photosynthesis
B
Transpiration
C
Aerobic respiration
D
Fermentation
Answers and explanations are in the Veda app.
Q28. How does the structure of red blood cells facilitate their function in transportation?
Intermediate
A
They are larger than other blood cells to carry more nutrients.
B
They contain chlorophyll for photosynthesis.
C
They have a nucleus that helps in cell division.
D
They are disc-shaped to increase surface area for oxygen absorption.
Answers and explanations are in the Veda app.
Q29. In the process of excretion, which organ is primarily responsible for filtering blood?
Intermediate
A
Kidney
B
Liver
C
Lungs
D
Skin
Answers and explanations are in the Veda app.
Q30. Which of the following statements best compares aerobic and anaerobic respiration?
Intermediate
A
Both processes produce the same amount of energy.
B
Only aerobic respiration occurs in plants.
C
Aerobic respiration occurs in the absence of oxygen, while anaerobic respiration requires oxygen.
D
Aerobic respiration produces carbon dioxide and water, while anaerobic respiration produces lactic acid or ethanol.
Answers and explanations are in the Veda app.
Q31. What role does the phloem play in plants?
Intermediate
A
Storing energy in the form of starch.
B
Facilitating gas exchange in leaves.
C
Transporting food from leaves to other parts of the plant.
D
Transporting water and minerals from roots to leaves.
Answers and explanations are in the Veda app.
Q32. Which nutrient is essential for the synthesis of enzymes and hormones in the body?
Intermediate
A
Vitamins
B
Fats
C
Proteins
D
Carbohydrates
Answers and explanations are in the Veda app.
Q33. Which of the following best describes the process of transpiration in plants?
Intermediate
A
The movement of water from roots to leaves.
B
The uptake of carbon dioxide from the atmosphere.
C
The release of oxygen during photosynthesis.
D
The loss of water vapor from aerial parts of the plant.
Answers and explanations are in the Veda app.
Q34. In humans, which system is primarily responsible for gas exchange?
Intermediate
A
Digestive system
B
Respiratory system
C
Nervous system
D
Circulatory system
Answers and explanations are in the Veda app.
Q35. Which of the following best explains the role of the circulatory system in nutrient distribution?
Intermediate
A
It breaks down nutrients into simpler molecules.
B
It transports nutrients from the digestive system to cells throughout the body.
C
It filters out waste products from the blood.
D
It stores nutrients until they are needed.
Answers and explanations are in the Veda app.
Q36. Which process involves the conversion of glucose into energy without the use of oxygen?
Intermediate
A
Aerobic respiration
B
Anaerobic respiration
C
Cellular respiration
D
Photosynthesis
Answers and explanations are in the Veda app.
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