Exam 14: Metabolic Diversity of Microorganisms

Whether an organism is classified as a photoheterotroph or a photoautotroph depends on its

Which metabolic strategy's existence suggests rapid growth is NOT always the best strategy to survive in the environment?

Propose why it would be advantageous for a photosynthetic microorganism to have more than one type of chlorophyll or bacteriochlorophyll.

A bacterium that uses CO₂ as an electron source but CANNOT use it as a carbon source is considered a mixotroph.

Anammox is an anaerobic process that generates energy from ________ and forms N₂.

The foul-smelling putrescine byproduct suggests activity of

In what types of organisms are carboxysomes found and what advantage do they provide for a cell?

What products would be expected to form during anoxic degradation of the seven-carbon compound benzoate following reduction and cleavage of the aromatic ring?

In photosynthesis, NADH and NADPH are produced from NAD ⁺ and NADP⁺ by

Chemolithotrophs that obtain electrons from donors such as sulfide use the same electron transport chains to obtain energy as chemoorganotrophs.

Which of the following is the best potential reason that anoxic methane-oxidizing Archaea have not also acquired the ability to reduce sulfate?

Organisms grown with CO₂ as its sole carbon source must have energy in the form of ATP as well as reducing power.

Plastocyanin is a

Which of the following are NOT found within the photosynthetic gene cluster of Rhodobacter (a purple phototrophic bacterium)?

Proteomic analysis of a microbial community indicated an abundance of phycobiliproteins. Which phototrophic group is likely active and abundant in this community?

Each chlorophyll and bacteriochlorophyll type is distinguished by its absorption spectrum.

At some of the lowest light concentrations, ________ can still grow well due to their ________, which effectively harvest photons for energy.

In Bacteria, the most common oxidized form of nitrogen is ________ and of sulfur is ________.

Iron-oxidizing bacteria grow better in alkaline environments where protons are less likely to abiotically convert Fe²⁺ into Fe³⁺.

Phycoerythrin is