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  • Question
  • The phosphate inhibition in the clavine formation with Claviceps SD58, can be counteracted by the addition of


  • Options
  • A. alanine
  • B. methionine
  • C. tryptophan
  • D. lysine

  • Correct Answer
  • tryptophan 


  • Microbial Metabolism problems


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    • 1. The reaction, where small precursor molecules are assembled into larger organic molecules is referred as

    • Options
    • A. anabolism
    • B. catabolism
    • C. metabolism
    • D. any of these
    • Discuss
    • 2. Digestive reactions where large molecules are broken down into smaller ones are referred as

    • Options
    • A. anabolism
    • B. catabolism
    • C. metabolism
    • D. biosynthesis
    • Discuss
    • 3. Which of the following groups contain(s) many unique coenzymes, such as coenzyme M and coenzyme F420?

    • Options
    • A. Sulfate-reducing bacteria
    • B. Methanotrophs (methane-oxidizing microbes)
    • C. Methanogens (methane-producing microbes)
    • D. Acetogens (acetigens; acetate-producing microbes)
    • Discuss
    • 4. Phosphate is considered to restrict the induction of

    • Options
    • A. primary metabolites
    • B. secondary metabolites
    • C. both (a) and (b)
    • D. none of these
    • Discuss
    • 5. Free energy change (?G) of a reaction is referred as the amount of energy

    • Options
    • A. liberated during reaction
    • B. taken up during reaction
    • C. liberated or taken up during reaction
    • D. none of these
    • Discuss
    • 6. In establishing proton gradient for chemiosmotic ATP generation by aerobic respiration the terminal electron acceptor is

    • Options
    • A. nitrate
    • B. oxygen
    • C. sulfate
    • D. CO2
    • Discuss
    • 7. In an oxygenic photosynthesis, the green and the purple bacteria do not use which of the following one as an electron source?

    • Options
    • A. H2O
    • B. H2
    • C. H2S
    • D. S (elemental sulphur)
    • Discuss
    • 8. Which of the following does not produce oxygen as a product of photosynthesis?

    • Options
    • A. Oak trees
    • B. Purple sulfur bacteria
    • C. Cyanobacteria
    • D. Phytoplankton
    • Discuss
    • 9. Standard free energy change (?G) can be expressed as

    • Options
    • A. ?G° = -RTlnkeq
    • B. ?G° = RTlnkeq
    • C. ?G° = R/Tlnkeq
    • D. ?G° = -RT/lnkeq
    • Discuss
    • 10. Entner - Doudoroff pathway is not found in

    • Options
    • A. aerobic prokaryotes
    • B. anaerobic prokaryotes
    • C. Both (a) and (b)
    • D. eukaryotes
    • Discuss


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