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  • Question
  • The bacteriochlorophylls used by the anoxygenic bacteria have absorbance maxima located in the_____portion(s) of the spectrum.


  • Options
  • A. green
  • B. blue
  • C. ultraviolet
  • D. infrared

  • Correct Answer
  • infrared 


  • Microbial Metabolism problems


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    • 1. If ?G of a chemical reaction is positive in value and keq is less than 1 then the chemical reaction will

    • Options
    • A. proceed in reverse direction
    • B. proceeed in forward direction
    • C. not take place in any of the direction
    • D. none of these
    • Discuss
    • 2. TCA cycle functions in

    • Options
    • A. catabolic reactions
    • B. anabolic reactions
    • C. amphibolic reactions
    • D. none of these
    • Discuss
    • 3. The reactions of the cell that are carried out for capturing energy are called

    • Options
    • A. catabolism
    • B. metabolism
    • C. anabolism
    • D. activation energy
    • Discuss
    • 4. The specific enzyme/(s) of the glyoxylate cycle is/are

    • Options
    • A. isocitrate lyase
    • B. malate synthase
    • C. both (a) and (b)
    • D. anaplerotic
    • Discuss
    • 5. Which of the following catalyze liberation of orthophosphate from organic P compounds and inorganic pyrophosphate?

    • Options
    • A. Alkaline phosphates
    • B. Oxidoreductase
    • C. Protease
    • D. Hydrogenase
    • Discuss
    • 6. DAHP synthetase catalyzes the condensation of

    • Options
    • A. erythrose-4-phosphate
    • B. phosphoenol pyruvate
    • C. both (a) and (b)
    • D. phenylalanine
    • Discuss
    • 7. Bacteriochlorophyll differs from chlorophyll in what way?

    • Options
    • A. The chelated metal in bacteriochlorophyll is not Mg
    • B. There are chemical differences between the two chlorophyll in their side (R) groups
    • C. They have different absorption spectra
    • D. Both (b) and (c)
    • Discuss
    • 8. If radioactive bicarbonate was supplied to bacterial cells, which were actively synthesizing fatty acids, it is expected to find the bulk of the radioactivity in

    • Options
    • A. cellular bicarbonate
    • B. the fatty acids
    • C. the cytoplasmic membrane
    • D. nucleic acids
    • Discuss
    • 9. During the reduction phase of the Calvin cycle, phosphoglyceric acid is reduced to______utilizing________as the reduction source.

    • Options
    • A. phosphoglyceraldehyde; NADPH+H+
    • B. phosphoglyceraldehyde; NADH+H+
    • C. ribulose 1,5 - bisphosphate; NADH+H+
    • D. pyruvic acid; NADPH+H+
    • Discuss
    • 10. The glyoxylate cycle is used by some microorganisms when___________ is the sole carbon source.

    • Options
    • A. acetate
    • B. nitrate
    • C. carbon dioxide
    • D. all of these
    • Discuss


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