20
Minutes
30
Questions
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Marking
Q1. If a potted plant is kept in a dark room for 48 hours before conducting the photosynthesis experiment, what is the purpose?
To kill the plant
To decolorize the leaves
To destarch the leaves
To close the stomata
Q2. Why do fishes die when taken out of water?
They cannot breathe in air
Their gills collapse and surface area for gas exchange decreases
They get too much oxygen
Their body temperature increases
Q3. A student added iodine solution to two test tubes containing starch solution. Tube A was kept at room temperature and Tube B was boiled. Which tube will show blue-black color?
Only Tube A
Only Tube B
Both tubes
Neither tube
Q4. In which of the following organisms, blood and tissue fluid are the same?
Fish
Cockroach
Human
Frog
Q5. A person is suffering from chest pain and breathlessness. Which blood vessel is most likely blocked?
Pulmonary artery
Coronary artery
Hepatic artery
Renal artery
Q6. Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?
Cells are located inside the body
Diffusion is a slow process
Body size is large and diffusion rate is slow
All of the above
Q7. During vigorous exercise, muscle cells respire anaerobically for some time. What is the product formed?
Carbon dioxide and water
Ethanol and carbon dioxide
Lactic acid and energy
Only carbon dioxide
Q8. A ring was removed from the bark of a tree. After some time, the portion above the ring became swollen. What is the reason?
Water accumulated above the ring
Food accumulated above the ring
Hormones accumulated above the ring
Minerals accumulated above the ring
Q9. Why do veins have thinner walls compared to arteries?
Veins carry deoxygenated blood
Blood pressure in veins is lower than arteries
Veins are located superficially
Veins have valves
Q10. A person has a blood pressure reading of 140/100 mm Hg. What does this indicate?
Normal blood pressure
Low blood pressure
High blood pressure (Hypertension)
Heart attack
Q11. Which of the following statements is correct about aerobic and anaerobic respiration?
Aerobic produces less energy than anaerobic
Both produce same amount of energy
Aerobic produces more energy than anaerobic
Anaerobic occurs in mitochondria
Q12. The walls of trachea are supported by cartilaginous rings. What is the function of these rings?
To filter air
To prevent collapse during inhalation
To warm the air
To produce mucus
Q13. Why is small intestine longer in herbivores compared to carnivores?
Herbivores are larger animals
Cellulose digestion takes longer time
Herbivores eat more food
Plant food is less nutritious
Q14. If a person's kidneys fail to function, which substance will accumulate in the blood?
Glucose
Urea
Amino acids
Oxygen
Q15. During digestion, fats are broken down into fatty acids and glycerol in presence of:
Pancreatic lipase and bile salts
Only bile salts
Only pancreatic lipase
Salivary amylase
...and 15 more challenging questions available in the interactive simulator.