Bacterial activity in Earth's crust may have deposited most of the gold through the process of: A) reduction of hydrosoluble Au³⁺ B) oxidation of Au³⁺ C) oxidation of gold ores D) all of the above E) none of the above

Question

Quizplus · Accepted Answer

Bacterial activity is known to cause reduction of hydrosoluble Au³⁺ to insoluble gold. This process is called Biomineralization and is believed to be the primary method of gold deposition in Earth's crust. Therefore, option A is the best choice. Option B and C are not correct as they involve oxidation of gold, whereas biomineralization involves reduction. Option D and E are also not correct as they are extreme options with all or none of the given choices being correct.

Bacterial Activity in Earth's Crust May Have Deposited Most of the Gold