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MCQs

Total Questions : 310 | Page 31 of 31 pages
Question 301. .  Nitrogen fixation is a process that requires
  1.    energy
  2.    an anaerobic environment
  3.    both (a) and (b)
  4.    an aerobic environment
 Discuss Question
Answer: Option C. -> both (a) and (b)
Question 302. . Bacteriochlorophyll differs from chlorophyll in what way?
  1.    The chelated metal in bacteriochlorophyll is not Mg
  2.    There are chemical differences between the two chlorophyll in their side (R) groups
  3.    They have different absorption spectra
  4.    Both (b) and (c)
 Discuss Question
Answer: Option D. -> Both (b) and (c)
Question 303. . Radioisotopes are frequently used in the study of cells. Assume a culture of E. coli is grown in a culture medium containing radioactive sulphur. At the end of 48 hours, it is expected to find the radioactive label located in
  1.    DNA
  2.    enzymes
  3.    RNA
  4.    all of these
 Discuss Question
Answer: Option B. -> enzymes
Question 304. . ATPase
  1.    synthesizes ATP, coupled to transfer of extracellular protons into the cell
  2.    extrudes protons from the cell coupled to the hydrolysis of ATP to ADP
  3.    is the enzyme that incorporates ATP into messenger RNA
  4.    carries out each of the reactions indicated in (a) and (b)
 Discuss Question
Answer: Option D. -> carries out each of the reactions indicated in (a) and (b)
Question 305. . Which of the following is responsible for phosphate solubilization?
  1.    Streptococcus
  2.    Streptomyces
  3.    Bacillus
  4.    Clostridium
 Discuss Question
Answer: Option B. -> Streptomyces
Question 306. . The mechanism of passive or facilitated diffusion require
  1.    metabolic energy
  2.    concentration of solute against an electrochemical gradient
  3.    accumulation of solute against an electrochemical gradient
  4.    accumulation or concentration of solute against an electrochemical gradient
 Discuss Question
Answer: Option A. -> metabolic energy
Question 307. . Phosphate deregulated mutants are
  1.    less sensitive to phosphate regulation
  2.    moderately sensitive to phosphate regulation
  3.    highly sensitive to phosphate regulation
  4.    none of these
 Discuss Question
Answer: Option A. -> less sensitive to phosphate regulation
Question 308. .  Nitrogen fixation is a process that requires
  1.    energy
  2.    an anaerobic environment
  3.    both (a) and (b)
  4.    an aerobic environment
 Discuss Question
Answer: Option C. -> both (a) and (b)
Question 309. . Bacteriochlorophyll differs from chlorophyll in what way?
  1.    The chelated metal in bacteriochlorophyll is not Mg
  2.    There are chemical differences between the two chlorophyll in their side (R) groups
  3.    They have different absorption spectra
  4.    Both (b) and (c)
 Discuss Question
Answer: Option D. -> Both (b) and (c)
Question 310. . Radioisotopes are frequently used in the study of cells. Assume a culture of E. coli is grown in a culture medium containing radioactive sulphur. At the end of 48 hours, it is expected to find the radioactive label located in
  1.    DNA
  2.    enzymes
  3.    RNA
  4.    all of these
 Discuss Question
Answer: Option B. -> enzymes

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