Chapter 5: Life Processes — Online MCQ Test
SCIENCE · CLASS 10 · Andhra State Board
Practice Chapter 5: Life Processes with a free chapter-wise online MCQ test.
This chapter covers: Nutrition Autotrophic Heterotrophic Photosynthesis Respiration Transportation Excretion Digestive system Circulatory system Xylem Phloem Nephron.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 5: Life Processes — Important Questions & Answers
Which mode of nutrition is used by green plants to prepare their own food?
- A. Autotrophic nutrition
- B. Heterotrophic nutrition
- C. Saprotrophic nutrition
- D. Parasitic nutrition
Answer: A. Autotrophic nutrition
Green plants prepare their own food using carbon dioxide, water and sunlight. This is called autotrophic nutrition.
Green plants prepare their own food using carbon dioxide, water and sunlight. This is called autotrophic nutrition.
Amoeba obtains food by surrounding it with its cell membrane. This process is called:
- A. Diffusion
- B. Endocytosis
- C. Transpiration
- D. Excretion
Answer: B. Endocytosis
Amoeba takes in food by forming temporary projections called pseudopodia around it. This method of intake is called endocytosis.
Amoeba takes in food by forming temporary projections called pseudopodia around it. This method of intake is called endocytosis.
A student covers part of a leaf with black paper and keeps the plant in sunlight. After the iodine test, only the uncovered part turns blue-black. What does this show?
- A. Oxygen is needed for photosynthesis
- B. Light is necessary for photosynthesis
- C. Water is not needed for photosynthesis
- D. Chlorophyll is not involved in photosynthesis
Answer: B. Light is necessary for photosynthesis
The uncovered part receives sunlight and forms starch, which turns blue-black with iodine. The covered part does not receive light and therefore does not make starch.
The uncovered part receives sunlight and forms starch, which turns blue-black with iodine. The covered part does not receive light and therefore does not make starch.
Why is aerobic respiration more efficient than anaerobic respiration?
- A. It occurs only in plants
- B. It releases much more energy from each glucose molecule
- C. It does not require glucose
- D. It produces alcohol in human muscles
Answer: B. It releases much more energy from each glucose molecule
Aerobic respiration completely breaks down glucose into carbon dioxide and water, releasing more energy. Anaerobic respiration gives only partial breakdown of glucose.
Aerobic respiration completely breaks down glucose into carbon dioxide and water, releasing more energy. Anaerobic respiration gives only partial breakdown of glucose.
A plant cell has enough carbon dioxide and water but lacks chlorophyll. What will be the direct effect on photosynthesis?
- A. Photosynthesis will occur faster
- B. Photosynthesis will not occur effectively because light cannot be trapped
- C. Only oxygen will be produced without glucose
- D. Glucose will be made without sunlight
Answer: B. Photosynthesis will not occur effectively because light cannot be trapped
Chlorophyll traps light energy needed for photosynthesis. Without chlorophyll, the plant cannot effectively convert carbon dioxide and water into glucose.
Chlorophyll traps light energy needed for photosynthesis. Without chlorophyll, the plant cannot effectively convert carbon dioxide and water into glucose.