Taxonomy is a science of classifying organisms meanwhile, phylogeny is an evolutionary relationship of organisms.

• True

• False

Which of the following is not included in the three domain system?

• Eubacteria

• Peptidoglycan

• Archaea

• Eukarya

Archaea bacteria can live in extreme conditions due to ester-containing linkages.

• True

• False

Polyphasic taxonomy consists of phenotypic and genotypic classification.

• True

• False

• Which of the following is not true about polyphasic taxonomy?

• To determine the genus and species of a newly discovered prokaryote

• Integrates several accepted ideas for the classification of bacteria.

• Involves phenotypic & genotypic approaches for bacterial classification

• Phenotypic approach is sufficient to infer evolutionary relationship

Which of the following is not a phenotypic trait?

• Colony morphology

• Cell shape and cell wall

• G+C rich content

• Biochemical characteristics

Genotypic classification aims to compare the observable and genetic similarity between organisms or whole genomes.

• True

• False

If two organism differ in their G+C content by more than 10%, their genome have quite different base sequencing.

• True

• False

• Which of the following is not true for DNA-DNA hybridization?

• It measures the percentage of each nucleotide present

• It measures the information on nucleotide sequence

• DNA homology measures the order of nucleotides and genome composition

• If no hybridization occurs, the organisms are unrelated

Small subunit rRNA is ideal for sequencing because..

• The structure changes very slowly with time

• They can tolerate large mutations

• They are the subject of horizontal gene transfer

• They are critical organelle that can only be found in certain organisms