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MCQs

Total Questions : 169 | Page 4 of 17 pages
Question 31. Macromolecules helps in formation of cell because they are
  1.    soluble
  2.    insoluble
  3.    stable
  4.    instable
 Discuss Question
Answer: Option B. -> insoluble
Answer: (b).insoluble
Question 32. Amylopectin starches are soluble in both hot and cold water and they have
  1.    branched chains
  2.    unbranched chains
  3.    glycosidic linkage
  4.    ring corners
 Discuss Question
Answer: Option A. -> branched chains
Answer: (a).branched chains
Question 33. A bacterial cell contains 70% of
  1.    proteins
  2.    water
  3.    lipids
  4.    DNA
 Discuss Question
Answer: Option B. -> water
Answer: (b).water
Question 34. In digestion process protein molecules are
  1.    water soluble
  2.    very large to pass through living membranes
  3.    need to by hydrolyzed to get digested
  4.    produce amino acids as the final product
 Discuss Question
Answer: Option A. -> water soluble
Answer: (a).water soluble
Question 35. Percentage of water in an average brain cell is
  1.    75%
  2.    85%
  3.    95%
  4.    80%
 Discuss Question
Answer: Option B. -> 85%
Answer: (b).85%
Question 36. Process of condensing many small molecules to form one large molecule is called
  1.    polymerization
  2.    condensation
  3.    hydrolysis
  4.    oxidation
 Discuss Question
Answer: Option A. -> polymerization
Answer: (a).polymerization
Question 37. Ozone depletion can be prevented with
  1.    use of scrubbers in factory chimneys
  2.    acidic waste is treated with alkalis
  3.    fossil fuels are used in factories
  4.    lower consumption of chlorofluorocarbons-based products
 Discuss Question
Answer: Option D. -> lower consumption of chlorofluorocarbons-based products
Answer: (d).lower consumption of chlorofluorocarbons-based products
Question 38. Combination of glucose (C₆H₁₂O₆) and fructose (C₆H₁₂O₆) molecules result in
  1.    maltose
  2.    sucrose
  3.    galactose
  4.    lactose
 Discuss Question
Answer: Option B. -> sucrose
Answer: (b).sucrose
Question 39. Which one is true about cuticlar transpiration
  1.    is the same as the stomatal transpiration
  2.    helps plant get rid of excess water
  3.    is more common in plants
  4.    looses lesser water as cuticle is relatively impermeable to water
 Discuss Question
Answer: Option D. -> looses lesser water as cuticle is relatively impermeable to water
Answer: (d).looses lesser water as cuticle is relatively impermeable to water
Question 40. Potometer is used to measure
  1.    rate of root pressure
  2.    capillary action
  3.    transpiration pull
  4.    all of above
 Discuss Question
Answer: Option C. -> transpiration pull
Answer: (c).transpiration pull

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