Similar to carbon, there are multiple stable isotopes of silicon, two of which are 28Si and 30Si. An organism that utilizes silicon instead of carbon to build its biomass would need to consume materials with silicon, such as clay, as food and would likely respire quartz (SiO2) as a by-product. If the enzymes for this organism operated similar to enzymes in organisms on Earth, which of the following would you expect to observe? a. The residual clay would be enriched in 28_Si while the quartz would be enriched in 30_Si
b. Both the residual clay and the quartz would be enriched in 30_Si
c. The residual clay would be enriched in 30_Si while the quartz would be enriched in 28_Si
d. Both the residual clay and the quartz would be enriched in 28_Si