Microbiology Chapter 1.1 Comprehension Check
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Questions and Answers

Which biomolecule is thought to be the first self-replicating biomolecule?

  • Protein
  • DNA
  • ATP
  • RNA (correct)

What is the endosymbiotic hypothesis for the origin of mitochondria, hydrogenosomes, and chloroplasts?

  • They emerged from primitive eukaryotic cells that engulfed archaea
  • They originated from self-replicating proteins
  • They emerged from primitive eukaryotic cells that engulfed bacteria (correct)
  • They originated from self-replicating membranes

What type of trees are based on assumptions about how evolution occurred and choose an ancestor for each node?

  • Distance-based trees
  • Rooted trees
  • Unrooted trees
  • Character-based trees (correct)

What does mutation involve?

<p>Changing the amino acid sequence of the parental gene (A)</p> Signup and view all the answers

What did Pasteur disprove with his experiment?

<p>Theory of spontaneous generation (C)</p> Signup and view all the answers

What distinguishes fungi from bacteria and archaea?

<p>Compartmentalization within the cells (A)</p> Signup and view all the answers

Which type of microorganism relies on hosts to multiply?

<p>Viroids (C)</p> Signup and view all the answers

What is a distinguishing characteristic of archaea compared to bacteria?

<p>Distinct membrane composition (B)</p> Signup and view all the answers

Which type of microorganism is composed of proteins and nucleic acids?

<p>Viruses (D)</p> Signup and view all the answers

What distinguishes protists from bacteria and archaea?

<p>Unicellularity and larger size (C)</p> Signup and view all the answers

Viruses, viroids, satellites, and prions are considered living organisms.

<p>False (B)</p> Signup and view all the answers

RNA is unable to perform catalytic activities such as peptide bond formation.

<p>False (B)</p> Signup and view all the answers

The energy currency of cells, ATP, is composed of deoxyribonucleotides.

<p>False (B)</p> Signup and view all the answers

Distance-based trees are based on assumptions about how evolution occurred and choose an ancestor for each node.

<p>False (B)</p> Signup and view all the answers

Rooted trees can only provide information on the divergence between the analyzed species.

<p>False (B)</p> Signup and view all the answers

Microorganisms have not had any significant impact on human health or the environment.

<p>False (B)</p> Signup and view all the answers

Fungi are always multicellular organisms.

<p>False (B)</p> Signup and view all the answers

Archaea have compartmentalized structures similar to bacteria.

<p>False (B)</p> Signup and view all the answers

Viroids are composed of both proteins and nucleic acids.

<p>False (B)</p> Signup and view all the answers

Prions are composed of nucleic acid enclosed in a protein shell.

<p>False (B)</p> Signup and view all the answers

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