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MCQs

Total Questions : 219 | Page 8 of 22 pages
Question 71. Molecule that an enzyme acts on is called
  1.    substrate
  2.    key
  3.    reactant
  4.    proton
 Discuss Question
Answer: Option A. -> substrate
Answer: (a).substrate
Question 72. Substrate is held on enzyme with help of which bond?
  1.    nitrogen bond
  2.    covalent bond
  3.    hydrogen bond
  4.    carbon bond
 Discuss Question
Answer: Option C. -> hydrogen bond
Answer: (c).hydrogen bond
Question 73. What is effect of enzymes on Activation energy?
  1.    uses the energy
  2.    lowers the energy
  3.    increases the energy
  4.    transfers the energy
 Discuss Question
Answer: Option B. -> lowers the energy
Answer: (b).lowers the energy
Question 74. At which of following pH, enzyme pepsin works best?
  1.    10
  2.    5
  3.    9
  4.    2
 Discuss Question
Answer: Option D. -> 2
Answer: (d).2
Question 75. All mechanical work in cell is powered by which of following?
  1.    protons
  2.    adenosine triphosphate
  3.    adenosine Tetraphophate
  4.    Nicotinamide Adenine Dinucleotide Phosphate (NADP)
 Discuss Question
Answer: Option B. -> adenosine triphosphate
Answer: (b).adenosine triphosphate
Question 76. How many olfactory receptor genes are present in mice?
  1.    1000
  2.    2000
  3.    3000
  4.    4000
 Discuss Question
Answer: Option A. -> 1000
Answer: (a).1000
Question 77. What is generation span of HIV?
  1.    1 day
  2.    2 days
  3.    10 days
  4.    1 week
 Discuss Question
Answer: Option B. -> 2 days
Answer: (b).2 days
Question 78. Evolution of change of allele frequencies over some time is called
  1.    microevolution
  2.    macroevolution
  3.    selection
  4.    Darwinism
 Discuss Question
Answer: Option A. -> microevolution
Answer: (a).microevolution
Question 79. Which of following is a scientific name for wild sunflower?
  1.    helianthus anomalus
  2.    Mus musculus
  3.    Zea mays
  4.    Neanderthals
 Discuss Question
Answer: Option A. -> helianthus anomalus
Answer: (a).helianthus anomalus
Question 80. All copies of every type of allele of all genes of a population are called
  1.    gene pool
  2.    gene population
  3.    genetics
  4.    genome
 Discuss Question
Answer: Option A. -> gene pool
Answer: (a).gene pool

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