Session 2: Signaling concepts in microorganisms

Epigenetic mechanisms in bacteria involve processes like

• DNA methylation in all bacteria

• histone modification in all bacteria

• both DNA methylation and histone modification

• DNA methylation in some bacteria and histone modification in others

DNA methylation in bacteria has the following roles

• Regulation of gene expression

• Defence against antibiotics

• Defence against exogenous DNA (i.e phages)

• Defence against exogenous DNA and Regulation of gene expression

Cytosine DNA methylation in Streptomyces coelicolor has a role in

• Antibiotic production and morphological differentiation

• Antibiotic degradation

• Morphological differentiation

• Antibiotic production

Which of the following bacteria is highly pathogenic towards insects?

• Micrococcus luteus

• Bacillus subtilis

• Photorhabdus luminescens

• Escherichia coli

How is the communication between bacteria designated?

• Quorum quenching

• Quorum sensing

• Microbe chatting

• Inter-kingdom-signaling

To which class of molecules does the following chemical compound belong?

 

• Acyl-Homoserinlactones

• Alpha-Pyrones

• Dialkylresorcinoles

• Acyl-Depsipepdides

What are the first buffering molecules interacting with pro-oxidants, such as oxyanions within the bacterial cell cytosol?

• Thiol-containing molecules

• Extracellular polymeric substance

• Enzymes of any sort

• None of the above

Actinomycetes are ideal bacterial candidates for what purposes?

• Biotransformation

• Biocatalysis

• Production of biotechnological relevant compounds and materials

• All the above

What is the main advantage of biogenic nanomaterials?

• Their natural thermodynamic stability

• The high production yields

• Their simplest structure as compared to chemogenic nanomaterials

• None of the above