O Level Biology Questions MCQs Quiz Online PDF Download

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IGCSE biology practice test MCQ: desertification is caused due to with options overgrazing, topsoil is eroded, rapid water evaporation from the soil and all of these for scholars competing for college and universities' scholarships with college board ACT practice test. Free study guide is for online learning o level biology questions quiz questions with MCQs to practice test questions with answers.

MCQs on O Level Biology Questions Quiz PDF 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