CBSE  /  Class 10  /  Science  /  Life Processes

  • 1. 
    The enzyme responsible for the digestion of proteins in the small intestine is:

  • Pepsin
  • Trypsin
  • Amylase
  • Lipase

  • 2. 
    The part where the exchange of gases occurs during respiration is:

  • Lungs and larynx
  • Alveoli and throat
  • Throat and lungs
  • Alveoli and capillaries

  • 3. 
    The back flow of blood during the pumping of blood by heart is prevented by:

  • Walls of ventncles
  • Walls of atrium
  • Valves in heart
  • Walls between atria and ventricles

  • 4. 
    The process of digestion is completed by:

  • Intestinal juice
  • trypsin
  • bile juice
  • pepsin

  • 5. 
    The extracellular fluid released from the capillaries is:

  • serum
  • plasma
  • lymph
  • mucus

  • 6. 
    A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains

  • complex proteins
  • simple proteins
  • fats
  • starch

  • 7. 
    In which part of the alimentary canal food is finally digested?

  • Stomach
  • Mouth cavity
  • Large intestine
  • Small intestine

  • 8. 
    When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of

  • oxygen
  • carbon dioxide
  • nitrogen
  • water vapour

  • 9. 
    What prevents backflow of blood inside the heart during contraction?

  • Valves in heart
  • Thick muscular walls of ventricles
  • Thin walls of atria
  • All of the above

  • 10. 
    In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?

  • Pisces and amphibians
  • Amphibians and reptiles
  • Amphibians only
  • Pisces only
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