Life Processes (Class 10 Science)
Life processes include nutrition, respiration, transportation, and excretion, which are essential for the survival and growth of all living organisms. Unde
TL;DR: Life processes include nutrition, respiration, transportation, and excretion, which are essential for the survival and growth of all living organisms.…
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Life processes include nutrition, respiration, transportation, and excretion, which are essential for the survival and growth of all living organisms. Unde
Life Processes MCQs with Answers & Explanations
Q1. Which of the following is not a life process?
- Crystallization ✓ (correct)
- Photosynthesis
- Digestion
- Respiration
Explanation: Crystallization is a physical process, not a life process. Life processes are biological activities that sustain life.
Q2. The process by which green plants prepare their own food is called:
- Respiration
- Photosynthesis ✓ (correct)
- Transpiration
- Decomposition
Explanation: Photosynthesis is the process where green plants use sunlight to convert carbon dioxide and water into glucose and oxygen.
Q3. Which organelle is responsible for photosynthesis in plant cells?
- Mitochondria
- Nucleus
- Chloroplast ✓ (correct)
- Ribosome
Explanation: Chloroplasts contain chlorophyll and are the sites of photosynthesis in plant cells.
Q4. The process of breaking down food into simple molecules to release energy is:
- Digestion
- Transpiration
- Photosynthesis
- Respiration ✓ (correct)
Explanation: Respiration is the process of breaking down glucose to release energy in the form of ATP for cellular activities.
Q5. Which type of respiration does not require oxygen?
- Anaerobic respiration ✓ (correct)
- Both require oxygen
- Photosynthesis
- Aerobic respiration
Explanation: Anaerobic respiration occurs without oxygen and is used by organisms like bacteria and yeast under oxygen-limited conditions.
Q6. The transport of water and minerals from roots to leaves is called:
- Phloem transport
- Xylem transport ✓ (correct)
- Diffusion
- Osmosis
Explanation: Xylem transport is the upward movement of water and minerals from roots to leaves through xylem vessels.
Q7. Which of the following is the main excretory organ in humans?
- Liver
- Heart
- Kidney ✓ (correct)
- Pancreas
Explanation: Kidneys are the main excretory organs that filter waste products from blood to form urine.
Q8. The rate of transpiration increases with:
- Decrease in light
- Increase in humidity
- Decrease in temperature
- Increase in temperature ✓ (correct)
Explanation: Transpiration increases with higher temperature, lower humidity, more light, and increased air movement.
Q9. Bile is produced by the:
- Liver ✓ (correct)
- Small intestine
- Stomach
- Pancreas
Explanation: Bile is produced by the liver and stored in the gallbladder to help emulsify fats during digestion.
Q10. The final products of aerobic respiration in plants and animals are:
- Glucose and O2
- CO2 and H2O ✓ (correct)
- Ethanol and CO2
- Lactate and CO2
Explanation: Aerobic respiration produces carbon dioxide and water as final products in both plants and animals.
Frequently Asked Questions
Why is the study of life processes important for understanding living organisms?
Life processes are fundamental to understanding how organisms grow, reproduce, maintain homeostasis, and respond to environmental changes.
How does photosynthesis differ from respiration?
Photosynthesis uses light energy to produce glucose from CO2 and water, while respiration breaks down glucose to release energy.
More Class 10 Science MCQs
- Light Reflection and Refraction
- Electricity
- Acids Bases and Salts
- Carbon and its Compounds
- Metals and Non-metals
- Matter in Our Surroundings
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