Prokaryotic Metabolism

Review Questions

Which of the following elements is not a micronutrient?

  1. boron
  2. calcium
  3. chromium
  4. manganese

Hint:

B

Prokaryotes that obtain their energy from chemical compounds are called _____.

  1. phototrophs
  2. auxotrophs
  3. chemotrophs
  4. lithotrophs

Hint:

C

Ammonification is the process by which _____.

  1. ammonia is released during the decomposition of nitrogen-containing organic compounds
  2. ammonium is converted to nitrite and nitrate in soils
  3. nitrate from soil is transformed to gaseous nitrogen compounds such as NO, N2O, and N2
  4. gaseous nitrogen is fixed to yield ammonia

Hint:

A

Plants use carbon dioxide from the air and are therefore called _____.

  1. consumers
  2. producers
  3. decomposer
  4. carbon fixers

Hint:

B

Cyanobacteria harness energy from the sun through photosynthesis, and oxidize water to provide electrons for energy generation. Thus, we classify cyanobacteria as _________.

  1. photolithotrophs
  2. photoautotrophs
  3. chemolithoautotrophs
  4. chemo-organotrophs

Hint:

A