Domains and kingdoms Knowledge-Based Download PDF

Questions

1. 1.

   In biological classification, which kingdom within the domain Eukarya comprises predominantly unicellular or simple multicellular organisms that do not fit into the definitions of plants, animals, or fungi?

   • A) Animalia
   • B) Plantae
   • C) Fungi
   • D) Protista
2. 2.

   The three-domain system established by Carl Woese separates all cellular life into Bacteria, Archaea, and Eukarya primarily based on comparative differences in which molecular characteristic?

   • A) Composition of structural proteins in the cell wall
   • B) Number of hydrogen bonds between DNA base pairs
   • C) Sequence variation within messenger RNA transcripts
   • D) Nucleotide sequences of small subunit ribosomal RNA
3. 3.

   Which kingdom within the domain Eukarya is characterized by organisms that possess cell walls composed of chitin and obtain nutrients primarily through absorptive heterotrophy?

   • A) Plantae
   • B) Fungi
   • C) Animalia
   • D) Protista
4. 4.

   Which characteristic is found in organisms belonging to the domain Archaea but is absent in organisms of the domain Bacteria?

   • A) Ether-linked membrane lipids containing branched hydrocarbon chains
   • B) A cell wall primarily composed of peptidoglycan
   • C) Membrane-bound organelles such as mitochondria
   • D) A single circular chromosome located in a nucleoid region
5. 5.

   In biological classification, which characteristic fundamentally distinguishes organisms belonging to the domain Eukarya from those in the domains Bacteria and Archaea?

   • A) Utilization of double-stranded DNA as the hereditary genetic material
   • B) Presence of a peptidoglycan meshwork within the cell wall
   • C) Ability to carry out translation using cellular ribosomes
   • D) Presence of a membrane-enclosed nucleus and specialized internal organelles