"Essential Life Processes – MCQ Practice Guide" (Covering Nutrition, Respiration, Transportation, and Excretion)

CHAPTER: LIFE PROCESSES
(Nutrition, Respiration, Transportation & Excretion)
Section A: Nutrition (1–25)
1. The process by which green plants prepare their food is called:
a) Respiration
b) Photosynthesis
c) Transpiration
d) Absorption
Answer: b) Photosynthesis

2. The site of photosynthesis in plant cells is:
a) Mitochondria
b) Nucleus
c) Chloroplast
d) Ribosome
Answer: c) Chloroplast

3. The raw materials for photosynthesis are:
a) CO₂ and O₂
b) CO₂ and H₂O
c) O₂ and H₂O
d) Glucose and CO₂
Answer: b) CO₂ and H₂O

4. The green pigment in leaves is:
a) Hemoglobin
b) Chlorophyll
c) Carotene
d) Xanthophyll
Answer: b) Chlorophyll

5. The process of taking in food by an organism is called:
a) Assimilation
b) Digestion
c) Ingestion
d) Absorption
Answer: c) Ingestion

6. The process of breakdown of complex food into simpler form is:
a) Assimilation
b) Digestion
c) Absorption

,d) Ingestion
Answer: b) Digestion

7. Which part of the alimentary canal receives bile from the liver?
a) Stomach
b) Duodenum
c) Ileum
d) Large intestine
Answer: b) Duodenum

8. Bile helps in digestion of:
a) Proteins
b) Carbohydrates
c) Fats
d) Vitamins
Answer: c) Fats

9. The enzyme that digests starch is:
a) Amylase
b) Lipase
c) Trypsin
d) Pepsin
Answer: a) Amylase

10. Which organ secretes bile?
a) Stomach
b) Liver
c) Pancreas
d) Gall bladder
Answer: b) Liver

11. The part of alimentary canal where protein digestion begins:
a) Mouth
b) Stomach
c) Small intestine
d) Large intestine
Answer: b) Stomach

12. The finger-like projections in the small intestine are called:
a) Cilia
b) Villi
c) Microvilli
d) Papillae
Answer: b) Villi

, 13. Which organ produces insulin?
a) Liver
b) Pancreas
c) Stomach
d) Kidney
Answer: b) Pancreas

14. Photosynthesis mainly occurs in which part of leaf?
a) Xylem
b) Spongy mesophyll
c) Palisade mesophyll
d) Phloem
Answer: c) Palisade mesophyll

15. The by-product of photosynthesis is:
a) CO₂
b) H₂O
c) O₂
d) Glucose
Answer: c) O₂

16. The equation of photosynthesis is:
a) CO₂ + H₂O → C₆H₁₂O₆ + O₂
b) CO₂ + O₂ → C₆H₁₂O₆
c) C₆H₁₂O₆ → CO₂ + H₂O
d) H₂O + O₂ → CO₂ + glucose
Answer: a) CO₂ + H₂O → C₆H₁₂O₆ + O₂

17. The enzyme that digests proteins in the stomach is:
a) Pepsin
b) Amylase
c) Lipase
d) Trypsin
Answer: a) Pepsin

18. The acid present in the stomach is:
a) H₂SO₄
b) HCl
c) HNO₃
d) Acetic acid
Answer: b) HCl

19. In amoeba, food is ingested by:
a) Mouth