O Level Biology Questions MCQs Test Online PDF Book Download

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MCQ on O Level Biology QuestionsQuiz Book Download

MCQ: Desertification is caused due to

  1. overgrazing
  2. topsoil is eroded
  3. rapid water evaporation from the soil
  4. all of these

D

MCQ: Breakage of hydrogen bonds in protein coils results in

  1. activation of enzymes
  2. denaturation of proteins
  3. expedites the digestive system
  4. inactivation of protein molecules

B

MCQ: Dietary imbalances cause

  1. malnutrition
  2. starvation
  3. eating only proteins
  4. high cholesterol

A

MCQ: Advantages of seed dispersal includes

  1. less spread of disease
  2. plants colonizing new habitats
  3. prevention of overcrowding of plants in same habitat
  4. all of these

D

MCQ: Starch (C6H10O5)n is digested to form maltose (C12H22O11) through enzyme

  1. maltase
  2. amylase
  3. diastase
  4. sucrose

C