The fluorescence marker tags to the enzyme when see with a powerful microscope the fluorescence will be observed in the mitochondrial matrix of the cell.
Explanation:
The enzyme responsible for the transfer of acetyl CoA group to oxaloacetate is ATP citrate lyase. It is produced in the matrix of the mitochondria in the cell during aerobic respiration.
The transfer of acetyl CoA group to oxaloacetate group marks start of the Kreb's cycle which also occurs in the matrix of mitochondria.
Hence the enzyme ATP citrate lyase when tagged with fluorescence will be seen in mitochondria of the cell.
Answer: Aquatic fossils would be found near the bottom of the core sampleRock cores provide valuable sources of information to geologists because it presents very accurate measurements of porosity of the rock. If a geologist obtained the rock core from a hillside and found aquatic fossils near the bottom of the core sample, he can conclude that this hillside was once covered by a body of water.