IGCSE Biology Paper-4: Specimen Questions with Answers 268 - 270 of 279

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Question 268

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Short Answer▾

Bile is made in the liver, stored in the gall bladder, and passes into the small intestine.

Describe the role of bile in digestion.

Explanation

Functions of Bile

  • Emulsification of fats.
  • Helps in absorption of fat-soluble vitamins.
  • Increases alkalinity to make the medium suitable for enzymatic action.
  • Elimination of heavy metals such as Cu, Hg, Zn etc.
  • Elimination of excess of bile pigments.
  • Stercobilin and urobilin is formed by bilirubin and biliverdin is responsible for coloration of faeces.

Question 269

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Short Answer▾

Enzyme activity is vital in human digestion.

Complete the table by choosing appropriate words from the list.

Enzyme Activity is Vital in Human Digestion
substrateenzymeproduct
fatglycerol +
protease
maltose

Explanation

Enzyme Activity is Vital in Human Digestion
substrateenzymeproduct
fatlipaseglycerol + fatty acids
proteinproteaseamino acids
starchamylasemaltose

Question 270

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Short Answer▾

Suggest the symptoms in a person suffering from Type 1 diabetes.

Explanation

Common Symptoms of Diabetes

  • Urinating often
  • Feeling very thirsty
  • Feeling very hungry, even though you are eating
  • Extreme fatigue
  • Blurry vision
  • Cuts/bruises that are slow to heal
  • Weight loss, even though you are eating more
  • Tingling, pain, or numbness in the hands/feet

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