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MCQs

Total Questions : 310 | Page 20 of 31 pages
Question 191. HPr stands for ______________
  1.    heat-stable carrier protein
  2.    hydrogen carrier protein
  3.    pyruvate dehydrogenase
  4.    high-energy protein
 Discuss Question
Answer: Option A. -> heat-stable carrier protein
Answer: (a).heat-stable carrier protein
Question 192. Mannitol enzyme II has been purified from _____________
  1.    E.coli
  2.    Salmonella typhimurium
  3.    Saccharomyces cerevisiae
  4.    Lactobacillus
 Discuss Question
Answer: Option A. -> E.coli
Answer: (a).E.coli
Question 193. Radioisotopes are frequently used in the study of cells. Assume a culture of E. coli is grown in a culture medium containing radioactive phosphorous. At the end of 48 hours, it is expected to find the radioactive label located in
  1.    RNA
  2.    all of these
  3.    enzymes
  4.    phospholipids
 Discuss Question
Answer: Option B. -> all of these
Question 194. During the carboxylation phase of the Calvin cycle, CO2 combines with
  1.    oxaloacetic acid
  2.    phosphoglyceraldehyde
  3.    pyruvic acid
  4.    ribulose 1,5 - bisphosphate
 Discuss Question
Answer: Option D. -> ribulose 1,5 - bisphosphate
Question 195. In the passive diffusion, solute molecules cross the membrane as a result of
  1.    concentration difference
  2.    all of these
  3.    pressure difference
  4.    ionic difference
 Discuss Question
Answer: Option A. -> concentration difference
Question 196. Which of the following groups contain(s) many unique coenzymes, such as coenzyme M and coenzyme F420?
  1.    Methanotrophs (methane-oxidizing microbes)
  2.    Methanogens (methane-producing microbes)
  3.    Sulfate-reducing bacteria
  4.    Acetogens (acetigens; acetate-producing microbes)
 Discuss Question
Answer: Option B. -> Methanogens (methane-producing microbes)
Question 197. In an oxygenic photosynthesis, the green and the purple bacteria do not use which of the following one as an electron source?
  1.    H2
  2.    H2O
  3.    H2S
  4.    S (elemental sulphur)
 Discuss Question
Answer: Option B. -> H2O
Question 198. Assimilatory sulfate reduction involves the nucleotide __________ during the incorporation of H2S in the production of __________ .
  1.    GTP; cytosine
  2.    ATP; methionine
  3.    UTP; cytosine
  4.    ATP; cytosine
 Discuss Question
Answer: Option D. -> ATP; cytosine
Question 199. In aerobic respiration, the terminal electron acceptor is
  1.    nitrogen
  2.    oxygen
  3.    hydrogen
  4.    nitrate
 Discuss Question
Answer: Option B. -> oxygen
Question 200. The chlorophyll molecules used by eucaryotes and cyanobacteria absorb radiant energy in the____________portion(s) of the visible spectrum.
  1.    green and ultraviolet
  2.    red and blue
  3.    green
  4.    red
 Discuss Question
Answer: Option B. -> red and blue

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