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BIOLOGY MCQs

Total Questions : 1207 | Page 120 of 121 pages
Question 1191. . Number of chromosomes in Down's syndrome is
  1.    46
  2.    47
  3.    48
  4.    49
 Discuss Question
Answer: Option B. -> 47
Question 1192. . Plants are killed in winter by frost
  1.    because of desiccation and mechanical damage to the tissues
  2.    because no photosynthesis takes place at such low temperature
  3.    because respiration ceases at such low temperature
  4.    because there is no transpiration
 Discuss Question
Answer: Option A. -> because of desiccation and mechanical damage to the tissues
Question 1193. . Pulses are a good source of
  1.    carbohydrates
  2.    fats
  3.    proteins
  4.    vitamins
 Discuss Question
Answer: Option C. -> proteins
Question 1194. . Oxygen in our blood is transported by a protein named
  1.    haemoglobin
  2.    keratin
  3.    collagen
  4.    myoglobin
 Discuss Question
Answer: Option A. -> haemoglobin
Question 1195. . Nymph is the name of young one of
  1.    butterfly
  2.    beetle
  3.    housefly
  4.    cockroach
 Discuss Question
Answer: Option D. -> cockroach
Question 1196. . 
One of the following is most suitable for study of mutations
  1.    Haploids
  2.    Diploids
  3.    Tetraploids
  4.    Polyploid
 Discuss Question
Answer: Option A. -> Haploids
Question 1197. . One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?
  1.    Having waited a day, it is too late to take an antibiotic
  2.    You need an antiseptic, not an antibiotic
  3.    You need to be vaccinated instead of taking an antibiotic
  4.    You are infected by a virus
 Discuss Question
Answer: Option D. -> You are infected by a virus
Question 1198. . Plants that grow under average temperature and moisture are called
  1.    halophytes
  2.    hydrophytes
  3.    mesophytes
  4.    xerophytes
 Discuss Question
Answer: Option C. -> mesophytes
Question 1199. . Pollination by wind is called
  1.    anemophily
  2.    hydrophily
  3.    zoophily
  4.    entomophily
 Discuss Question
Answer: Option A. -> anemophily
Question 1200. . Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?
  1.    By cyanobacteria
  2.    By electrical discharges in the atmosphere
  3.    By industrially synthesised fertilizer
  4.    By denitrification
 Discuss Question
Answer: Option D. -> By denitrification

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