Both Beggiatoa and the Purple Sulfur Bacteria Use H₂S

question 15

Multiple Choice

Both Beggiatoa and the purple sulfur bacteria use H₂S. These bacteria differ in that Beggiatoa

• A) belongs to the gammaproteobacteria.
• B) uses H₂S for a carbon source.
• C) uses H₂S for an energy source.
• D) uses light energy.
• E) is a heterotroph.

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Definitions:

Genetically Engineered

Refers to organisms whose genetic material has been artificially manipulated in a laboratory through genetic engineering techniques, often to express desired traits.

UV Radiation

Electromagnetic radiation with a wavelength shorter than that of visible light but longer than X-rays, capable of causing chemical reactions and damaging living tissues.

Oxygen

A reactive, life-supporting component of the air, primarily required for cellular respiration in aerobic organisms.

Gene Silencing

The process by which the expression of a gene is prevented or reduced, typically through natural cellular mechanisms.