The Basics of Life

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Questions and Answers

What is the main difference between bacterial and archaeal metabolic machinery?

  • They have the same metabolic machinery
  • They both exhibit much less size variation
  • They both lack defined nuclei
  • They have different DNA size and base composition (correct)

Which type of DNA molecules exhibit the greatest size variation?

  • Viral DNA molecules (correct)
  • Bacterial DNA molecules
  • Eukaryotic DNA molecules
  • All DNA molecules exhibit the same level of size variation

Which domains make up the living world?

  • Plants and animals
  • Fungi and protozoa
  • Bacteria and archaea (correct)
  • Eukaryotes and viruses

What is the characteristic size of each kind of chromosome in a eukaryotic nucleus?

<p>They have a DNA with a characteristic size (B)</p> Signup and view all the answers

What is the main difference between the DNA location in eukaryotes and bacteria/archaea?

<p>Eukaryotes have a defined cell nucleus, while bacteria/archaea have DNA in the cytoplasm (B)</p> Signup and view all the answers

What is the name of the membrane-bound compartment in eukaryotic cells that contains most of the cell's DNA?

<p>Nucleus (A)</p> Signup and view all the answers

What are chromosomes?

<p>Long, coiled DNA molecules in the cell nucleus (D)</p> Signup and view all the answers

What is the term used to describe cells that lack a defined nucleus?

<p>Prokaryotes (A)</p> Signup and view all the answers

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