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MCQs

Total Questions : 173 | Page 14 of 18 pages
Question 131. Bacteria decompose dead plants and algae by increasing their growth rate and using
  1.    dissolved oxygen
  2.    carbon dioxide
  3.    nitrogen
  4.    nutrients
 Discuss Question
Answer: Option A. -> dissolved oxygen
Answer: (a).dissolved oxygen
Question 132. Ammonium salts include
  1.    Ammonium chloride
  2.    ammonium nitrate
  3.    ammonium sulfate
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
Answer: (d).all of above
Question 133. Nitrogen-based fertilizer formed from ammonia and nitric acid is
  1.    Ammonium chloride
  2.    ammonium nitrate
  3.    ammonium sulfate
  4.    ammonium carbonate
 Discuss Question
Answer: Option B. -> ammonium nitrate
Answer: (b).ammonium nitrate
Question 134. Hydrogen is also obtained as a by-product of cracking of heavy fractions from
  1.    coal
  2.    crude oil
  3.    petrol
  4.    propane
 Discuss Question
Answer: Option B. -> crude oil
Answer: (b).crude oil
Question 135. The smoke released by car exhaust fumes are of
  1.    nitrogen
  2.    nitrates
  3.    nitrogen oxides
  4.    ammonia
 Discuss Question
Answer: Option C. -> nitrogen oxides
Answer: (c).nitrogen oxides
Question 136.  When the amino acid alanine (R-group is CH3) is added to a solution with a pH of 7.3, alanine becomes
  1.    a cation
  2.    nonpolar
  3.    a zwitterions
  4.    an isotope
 Discuss Question
Answer: Option C. -> a zwitterions
Question 137.  What is the end product of leucine metabolism?
  1.    Acetyl-CoA
  2.    Pyruvic acid
  3.    Oxaloacetic acid
  4.    Acetyl carnitine
 Discuss Question
Answer: Option A. -> Acetyl-CoA
Question 138.  Which of the following amino acids can form hydrogen bonds with their side (R) groups?
  1.    Asparagine
  2.    Aspartic acid
  3.    Glutamine
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 139.  Molecules that bear charged groups of opposite polarity are known as
  1.    zwitterions
  2.    ambions
  3.    ion conversion
  4.    amphions
 Discuss Question
Answer: Option A. -> zwitterions
Question 140.  What is the heaviest of the twenty amino acids?
  1.    Phenylalanine
  2.    Tryptophan
  3.    Tyrosine
  4.    Histidine
 Discuss Question
Answer: Option B. -> Tryptophan

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