Problema 8 · Biología URV Practice Test: Biology and Genetics of Prokaryotes

1. What is the primary elemental byproduct released by green and purple sulfur bacteria performing anoxygenic photosynthesis?

Solución: b) Elemental sulfur (S⁰)

2. Which of the following metabolic processes yields the largest amount of ATP per mole of glucose?

Solución: c) Aerobic respiration

3. Microbial sulfur globules are typically observed in taxa that colonize habitats rich in:

Solución: b) Hydrogen sulfide (H₂S)

4. Which metabolic category relies on organic molecules as a carbon source while obtaining energy from light?

Solución: b) Photoheterotrophs

5. What serves as the fundamental electron donor in cyanobacterial and plant oxygenic photosynthesis?

Solución: b) Water (H₂O)

6. In the process of transduction, transfer of host genetic material is mediated by:

Solución: c) A bacteriophage viral particle

7. Substrate-level phosphorylation during standard glycolytic fermentation of one glucose molecule nets:

Solución: b) 2 ATP

8. Which metabolic pathway operates without the requirement of an external terminal electron acceptor?

Solución: a) Fermentation

9. The Calvin cycle plays an indispensable physiological role in:

Solución: b) Fixation of inorganic carbon dioxide into organic carbohydrates

10. Which of the following bacterial groups utilizes anoxygenic photosynthesis?

Solución: b) Purple sulfur bacteria