Life Processes MCQ Quiz

30 questions

1. What is the mode of nutrition in Amoeba?

   1. Parasitic
   2. Holozoic
   3. Saprophytic
   4. Autotrophic

2. Which enzyme present in saliva breaks down starch into simple sugars?

   1. Pepsin
   2. Trypsin
   3. Salivary Amylase
   4. Lipase

3. The inner lining of the stomach is protected from hydrochloric acid by which substance?

   1. Pepsin
   2. Mucus
   3. Bile
   4. Lipase

4. Which chamber of the human heart receives oxygenated blood from the lungs?

   1. Right Atrium
   2. Left Atrium
   3. Right Ventricle
   4. Left Ventricle

5. The breakdown of pyruvate to give carbon dioxide, water, and energy takes place in:

   1. Cytoplasm
   2. Mitochondria
   3. Chloroplast
   4. Nucleus

6. Lack of oxygen in muscles during heavy physical exercise often leads to cramps due to conversion of pyruvate to:

   1. Ethanol
   2. Lactic acid
   3. Carbon dioxide
   4. Glucose

7. Which plant tissue is responsible for the translocation of food synthesized in leaves?

   1. Xylem
   2. Phloem
   3. Parenchyma
   4. Collenchyma

8. The functional unit of the human kidney is called:

   1. Neuron
   2. Nephron
   3. Alveoli
   4. Bowman's capsule

9. Which component of blood helps in blood clotting at the site of an injury?

   1. RBCs
   2. WBCs
   3. Platelets
   4. Plasma

10. The movement of food through the alimentary canal by rhythmic contraction is called:

    1. Transpiration
    2. Peristalsis
    3. Circulation
    4. Translocation

11. Bile juice is secreted by which organ?

    1. Stomach
    2. Pancreas
    3. Liver
    4. Gallbladder

12. Which gas is absorbed by plants during photosynthesis?

    1. Oxygen
    2. Carbon Dioxide
    3. Nitrogen
    4. Hydrogen

13. The opening and closing of stomatal pores is controlled by:

    1. Chloroplasts
    2. Guard cells
    3. Roots
    4. Epidermal cells

14. Trypsin enzyme digests which of the following nutrients?

    1. Carbohydrates
    2. Proteins
    3. Fats
    4. Vitamins

15. The loss of water in the form of vapor from the aerial parts of a plant is called:

    1. Photosynthesis
    2. Transpiration
    3. Respiration
    4. Gutting

16. Which blood vessel carries deoxygenated blood from the heart to the lungs?

    1. Pulmonary Vein
    2. Pulmonary Artery
    3. Aorta
    4. Vena Cava

17. The respiratory pigment present in human red blood cells is:

    1. Chlorophyll
    2. Hemoglobin
    3. Carotene
    4. Xanthophyll

18. Which part of the alimentary canal receives bile and pancreatic juice?

    1. Stomach
    2. Small Intestine
    3. Large Intestine
    4. Oesophagus

19. Carbohydrates in plants are stored in the form of:

    1. Glycogen
    2. Starch
    3. Glucose
    4. Sucrose

20. Carbohydrates in animals are stored in the form of:

    1. Starch
    2. Cellulose
    3. Glycogen
    4. Maltose

21. Filtered liquid in the Bowman's capsule is called:

    1. Urine
    2. Nephric filtrate
    3. Sweat
    4. Plasma

22. The organ where complete digestion of food takes place in humans is:

    1. Stomach
    2. Small Intestine
    3. Large Intestine
    4. Mouth

23. Emulsification of fats is brought about by:

    1. Pepsin
    2. Bile salts
    3. Lipase
    4. Trypsin

24. Which vessels have thick, elastic muscular walls?

    1. Veins
    2. Capillaries
    3. Arteries
    4. Lymphatics

25. Single-circulation of blood occurs in which group of animals?

    1. Birds
    2. Amphibians
    3. Fishes
    4. Mammals

26. Anaerobic respiration in yeast yields energy along with:

    1. Lactic acid and CO2
    2. Ethanol and CO2
    3. Water and CO2
    4. Pyruvate

27. Small balloon-like structures in human lungs where exchange of gases occurs are:

    1. Bronchi
    2. Bronchioles
    3. Alveoli
    4. Trachea

28. What prevents the collapse of the air passage in humans?

    1. Diaphragm
    2. Rings of cartilage
    3. Ribs
    4. Mucus

29. Main nitrogenous waste excreted by human kidneys is:

    1. Ammonia
    2. Uric acid
    3. Urea
    4. Amino acid

30. Translocation of soluble products of photosynthesis requires energy in the form of:

    1. ADP
    2. ATP
    3. NADP
    4. Pyruvate

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