MCQ's of LIFE PROCESSES CHAPTER

The process of breaking down complex food substances into simpler ones is called: (a) Absorption (b) Assimilation (c) Digestion (d) Ingestion

• (c) Digestion

• Fermentation

• Metabolism

• Excretion

The main site of absorption of nutrients in humans is: (a) Stomach (b) Small intestine (c) Large intestine (d) Liver

• d) Gallbladder

• b) Small intestine

• a) Esophagus

• c) Pancreas

Which enzyme is responsible for the breakdown of carbohydrates in the mouth? (a) Pepsin (b) Trypsin (c) Lipase (d) Salivary amylase

• Amylase

• Cellulase

• Protease

• Salivary amylase

The process by which plants synthesize their own food is called: (a) Photosynthesis (b) Respiration (c) Transpiration (d) Excretion

• Digestion

• Photosynthesis

• Pollination

• Fermentation

The final product of aerobic respiration is: (a) Carbon dioxide (b) Water (c) Carbon dioxide and water (d) Lactic acid

• a) Oxygen

• d) Glucose

• b) Ethanol

• c) Carbon dioxide and water

The process of breaking down glucose in the absence of oxygen is called: (a) Aerobic respiration (b) Anaerobic respiration (c) Photosynthesis (d) Excretion

• Krebs cycle

• (b) Anaerobic respiration

• Fermentation

• Cellular respiration

Which organelle is responsible for cellular respiration? (a) Nucleus (b) Mitochondria (c) Ribosomes (d) Chloroplasts

• d) Lysosomes

• c) Endoplasmic reticulum

• a) Golgi apparatus

• b) Mitochondria

The blood vessel that carries oxygenated blood away from the heart is: (a) Vein (b) Artery (c) Capillary (d) Aorta

• Jugular vein

• Coronary artery

• d

• Pulmonary vein

Which vitamin is primarily produced when the skin is exposed to sunlight? (a) Vitamin A (b) Vitamin B12 (c) Vitamin C (d) Vitamin D

• Vitamin K

• Vitamin E

• Vitamin B6

• (d) Vitamin D

What is the primary function of red blood cells? (a) Fight infection (b) Carry oxygen (c) Clot blood (d) Regulate temperature

• Produce hormones

• (b) Carry oxygen

• Remove carbon dioxide

• Transport nutrients