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- 1. Multiple Choice
Which of the following is the first site for the exchange of inhaled air?
Blood capillaries of lungs
Alveoli of lungs
Left auricle of the heart
Blood capillaries adjacent to body cells
- 2. Multiple Choice
Lymph does not comprise of
Red Blood Corpuscles
Lymphocytes
Leucocytes
Nitrogenous Waste
- 3. Multiple Choice
Crocodiles have ______ chambered heart.
two
three
four
none of these
- 4. Multiple Choice
An enzyme 'X' that converts starch to simple sugars is also the first enzyme to mix with food in the digestive tract. Identify 'X'
Pepsin
Amylase
Lipase
None of these
- 5. Multiple Choice
Which among of the following substances are reabsorbed in the nephron?
Urea, Uric acid, Amino acid
Glucose, Amino acids, Salts
Glucose, Urea, Creatinine
KCl, Urea, Glucose
- 6. Multiple Choice
How is food transported to the food vacuole of paramecium?
By movement of cilia
By pseudopodia
Food vacuole directly captures the food
By contractile vacuole
- 7. Multiple Choice
The process of obtaining food to meet the energy demands of the body is known as _____.
Excretion
Respiration
Nutrition
Circulation
- 8. Multiple Choice
The process that involves oxidation of food to release energy is known as _____
Breathing
Excretion
Circulation
respiration
- 9. Multiple Choice
what could be the possible explanation for the evolution of a four-chambered heart in mammals as opposed to a two-chambered heart in fishes?
In fishes oxygenation of blood takes place in heart.
Fishes have efficient gills.
Fishes can store more energy than mammals.
Fishes do not require energy to maintain their body temperature.
- 10. Multiple Choice
What happens to the unused carbohydrates produced in the plant body?
Gets broken down and dissipated as heat.
Transported to stem in the form of glycogen.
Expelled from plant body through excretion.
Stored in the form of starch for future use.
- 11. Multiple Choice
Saliva in the mouth converts _______ into _______________.
Proteins, amino acids
glycogen, glucose
starch, maltose
fats, vitamins
- 12. Multiple Choice
Name the tissue in a leaf where plastids are present_____
Endodermis
Epithelial cell
Mesophyll
Mitochondria
- 13. Multiple Choice
Choose the correct function of the given structure.
Gaseous exchange
Absorbs salt and water.
Reabsorption of urea and uric acid
none of these
- 14. Multiple Choice
Name the tissue responsible for the transportation of sugar and amino acids in plants.
Xylem
Stomata
root hairs
Phloem
- 15. Multiple Choice
Identify the structure.
Nephron
Alveolar sac
Alimentary canal
None of these
- 16. Multiple Choice
Assertion: Lungs become empty after the forceful expiration.
Reason: The forcefully exhaled air is called the residual volume of air.
Both A and R are true and R is the correct explanation of the A.
Both A and R are true but R is not the correct explanation of the A.
A is true but R is false.
Both A and R are false.
- 17. Multiple Choice
A: The length of the small intestine in cows is longer than in tigers.
R: Cellulose digestion takes lesser time than the digestion of flesh.
Both A and R are true and R is the correct explanation of the A.
Both A and R are true but R is not the correct explanation of the A.
A is true but R is false.
A is false but R is true.
- 18. Multiple Choice
A: Walls of the intestine have numerous villi.
R: These villi increase the surface area of digestion.
Both A and R are true but R is the correct explanation of the A.
Both A and R are true but R is not the correct explanation of the A.
A is true but R is false.
A is false but R is true.
- 19. Multiple Choice
A: Lipase helps in the emulsification of fats.
R: Lipase hydrolyses fats and oils.
Both A and R are true and R is the correct explanation of the A.
Both A and R are true and R is not the correct explanation of the A.
A is true but R is false.
A is false but R is true,
- 20. Multiple Choice
A: When air is passed through lime water, it turns milky.
R: air contains 78% nitrogen and 21% oxygen.
Both A and R are true and R is the correct explanation of the A.
Both A and R are true and R is not the correct explanation of the A.
A is true but R is false.
A is false but R is true.
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