Marine Microbiology Quiz

The majority of marine microorganisms are found in:

• Deep-sea sediments

• Hydrothermal vents

• Photic zone

• Intertidal region

Which group of microorganisms is known as the most ancient life forms in marine habitats?

• Bacteria

• Archaea

• Fungi

• Cyanobacteria

Marine Cyanobacteria like Prochlorococcus play a crucial role in:

• Nitrogen fixation

• Sulphur cycle

• Primary production

• Methanogenesis

Which marine microorganisms are responsible for the production of dimethylsulfoniopropionate (DMSP)?

• Cyanobacteria

• Marine algae

• Marine fungi

• Marine archaea

Which marine microorganisms lack true cellular structures?

• Viruses

• Cyanobacteria

• Archaea

• Bacteria

Viroids differ from viruses in that they:

• Lack protein coat

• Have DNA genome

• Infect only animals

• Contain lipid envelope

Prions cause diseases by:

• DNA mutation

• Protein misfolding

• RNA replication

• Lipid peroxidation

Which is the most abundant photosynthetic organism in marine ecosystems?

• Thalassiosira

• Prochlorococcus

• Saccharina

• Gracilaria

Marine fungi are mainly responsible for:

• Methane production

• Decomposition of organic matter

• Nitrogen fixation

• Bioluminescence

Which domain dominates microbial communities in hydrothermal vent ecosystems?

• Bacteria

• Archaea

• Fungi

• Algae