10TH CBSE SCIENCDE life process 50 MCQS QUIZ

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Life Processes

5 Theory-Based MCQ Tests • 10 Questions Each • 50 Questions

Instructions

• There are 5 tests, with 10 questions per test.
• Questions are selected/reframed as theory and concept-based questions from the uploaded Life Process material.
• Submit a test to calculate your score.
• Correct answers are hidden after submission.
• Enter the password to reveal the correct answers.

Password is required separately for each test after submission.

Test 1 — Nutrition & Photosynthesis

10 questions • 1 mark each

1. What is the main difference between autotrophic and heterotrophic nutrition?

A. Autotrophs make their own food, while heterotrophs depend on other sourcesB. Autotrophs cannot use sunlight, while heterotrophs canC. Autotrophs digest food externally, while heterotrophs do notD. There is no difference

2. Which substances are required for autotrophic nutrition in green plants?

A. Carbon dioxide and waterB. Oxygen and glucoseC. Protein and oxygenD. Nitrogen and starch

3. Which pigment absorbs light energy for photosynthesis?

A. HaemoglobinB. ChlorophyllC. MelaninD. Keratin

4. The oxygen released during photosynthesis comes from:

A. GlucoseB. Carbon dioxideC. WaterD. Chlorophyll

5. What is the main role of chlorophyll in photosynthesis?

A. It absorbs light energyB. It absorbs mineralsC. It produces carbon dioxideD. It stores urea

6. Which substance is stored as an energy reserve in autotrophic plants?

A. GlycogenB. StarchC. ProteinD. Urea

7. What is the first stage of human nutrition?

A. AbsorptionB. AssimilationC. IngestionD. Digestion

8. Where does digestion of food begin in humans?

A. StomachB. MouthC. Small intestineD. Large intestine

9. What is the function of salivary amylase?

A. It digests proteinsB. It breaks down starch into sugarsC. It digests fatsD. It absorbs water

10. Why does chewing help digestion?

A. It decreases the surface area of foodB. It increases the surface area available for digestionC. It converts proteins into fatsD. It prevents enzyme action

Correct answers are locked.

Test 2 — Human Digestion & Respiration

10 questions • 1 mark each

1. Where are proteins first digested in the human alimentary canal?

A. MouthB. OesophagusC. StomachD. Large intestine

2. What protects the inner lining of the stomach from hydrochloric acid?

A. BileB. MucusC. AmylaseD. Trypsin

3. Which organ receives bile from the liver?

A. StomachB. Small intestineC. Large intestineD. Oesophagus

4. What is the main role of bile in digestion?

A. It digests proteins directlyB. It emulsifies fatsC. It digests starchD. It absorbs glucose

5. What is the role of villi in the small intestine?

A. They produce oxygenB. They provide a large surface area for absorptionC. They store bileD. They pump blood

6. Which component of food is digested by amylase in saliva and pancreatic juice?

A. ProteinB. FatC. CarbohydrateD. Mineral

7. What is breathing?

A. Movement of air into and out of the lungsB. Oxidation of food inside cellsC. Absorption of nutrientsD. Formation of urea

8. Which muscles are important in the mechanism of breathing?

A. Biceps and tricepsB. Intercostal muscles and diaphragmC. Stomach muscles onlyD. Cardiac muscles only

9. Why do aquatic organisms generally breathe faster than terrestrial organisms?

A. Water contains less dissolved oxygenB. They have larger lungsC. They do not require oxygenD. Water contains more oxygen

10. Which structure is known as the sound box of the respiratory tract?

A. TracheaB. LarynxC. BronchusD. Alveolus

Correct answers are locked.

Test 3 — Cellular Respiration & Transport

10 questions • 1 mark each

1. What is cellular respiration?

A. Oxidation of food substances to release energyB. Formation of food from mineralsC. Removal of urineD. Transport of oxygen only

2. What is the energy currency of cells?

A. DNAB. ATPC. RNAD. ADP

3. Where does the aerobic breakdown of pyruvate into carbon dioxide, water and energy occur?

A. NucleusB. CytoplasmC. MitochondriaD. Chloroplast

4. What happens to pyruvate during vigorous exercise when oxygen is insufficient?

A. It is converted into lactic acidB. It becomes starchC. It becomes proteinD. It is converted into urea

5. Why can yeast live without oxygen?

A. It obtains energy through anaerobic respirationB. It performs photosynthesisC. It stores oxygenD. It cannot obtain energy

6. What is fermentation in the context of the source material?

A. A form of anaerobic respirationB. A form of photosynthesisC. A form of circulationD. A form of excretion

7. Which blood vessel carries blood back toward the heart?

A. ArteryB. VeinC. CapillaryD. Aorta

8. What is the function of valves in the circulatory system?

A. They prevent backward flow of bloodB. They digest foodC. They oxygenate bloodD. They produce red blood cells

9. What is the main role of capillaries?

A. They connect tissues and allow exchange of materialsB. They pump blood from the heartC. They store urineD. They digest fats

10. Which chamber of the human heart pumps oxygenated blood to the body?

A. Right atriumB. Right ventricleC. Left atriumD. Left ventricle

Correct answers are locked.

Test 4 — Transport in Plants & Excretion

10 questions • 1 mark each

1. Which tissue transports water and dissolved minerals in plants?

A. PhloemB. XylemC. EpidermisD. Cortex

2. Which tissue transports food from leaves to other parts of a plant?

A. XylemB. PhloemC. StomataD. Root hair

3. What is translocation?

A. Transport of food from leaves to other parts of a plantB. Loss of water vapour from leavesC. Absorption of oxygen by rootsD. Formation of urine

4. What creates the transpiration pull responsible for upward movement of water?

A. Evaporation of water from aerial partsB. Digestion of starchC. Formation of ureaD. Movement of food in phloem

5. Why is transpiration important in plants?

A. It helps create a pull that moves water and minerals upwardB. It stops all gas exchangeC. It produces proteins directlyD. It stores food

6. How does gas exchange occur through the roots according to the source?

A. Through root hairsB. Through xylem vesselsC. Through flowers onlyD. Through phloem

7. What is the main excretory unit of the human kidney?

A. NeuronB. NephronC. NephridiumD. Alveolus

8. What is the main function of the urinary bladder?

A. To produce ureaB. To store urineC. To filter bloodD. To produce urine

9. What is dialysis?

A. Cleaning the blood using a kidney machineB. Digestion of proteinsC. Transport of foodD. Exchange of gases

10. What is the main function of nephrons?

A. They form urine and help maintain body homeostasisB. They pump oxygenated bloodC. They digest carbohydratesD. They produce bile

Correct answers are locked.

Test 5 — Integrated Life Processes

10 questions • 1 mark each

1. Which sequence correctly represents human nutrition?

A. Digestion → ingestion → absorption → assimilationB. Ingestion → digestion → absorption → assimilationC. Absorption → digestion → ingestion → assimilationD. Assimilation → absorption → digestion → ingestion

2. Which sequence correctly represents the main parts of the human alimentary canal?

A. Mouth → oesophagus → stomach → small intestine → large intestineB. Mouth → stomach → oesophagus → small intestine → large intestineC. Mouth → oesophagus → large intestine → stomach → small intestineD. Mouth → small intestine → stomach → oesophagus → large intestine

3. Which route correctly represents blood flow through the human heart and lungs?

A. Right atrium → right ventricle → lungs → left atrium → left ventricleB. Left atrium → left ventricle → lungs → right atrium → right ventricleC. Right atrium → left ventricle → lungs → left atrium → right ventricleD. Left atrium → right atrium → lungs → left ventricle → right ventricle

4. Which type of circulation is found in fishes?

A. Double circulationB. Single circulationC. No circulationD. Triple circulation

5. Which type of heart is characteristic of humans?

A. Two-chamberedB. Three-chamberedC. Four-chamberedD. One-chambered

6. Which organism in the source is described as having a three-chambered heart?

A. PigeonB. LizardC. FishD. Lion

7. Which organism obtains oxygen through gills rather than lungs?

A. CowB. FishC. FoxD. Lion

8. What happens when water moves out of guard cells?

A. Stomatal pores closeB. Stomatal pores always enlargeC. Photosynthesis immediately stops permanentlyD. Roots stop absorbing minerals

9. Which statement best describes the role of ATP in plant translocation?

A. ATP provides energy for transport of food through phloemB. ATP is used only for water absorptionC. ATP replaces chlorophyllD. ATP is the main component of xylem

10. Why is movement of substances essential for life processes?

A. Cells need materials and energy and must remove wastesB. It prevents all chemical reactionsC. It eliminates the need for respirationD. It stops organisms from growing

Correct answers are locked.