De novo purine synthesis occurs by the stepwise addition of atoms or groups of atoms to 5‑phosphoribosyl 1‑pyrophosphate (PRPP). The atoms of the purine rings are supplied by glutamate, glycine, glutamine, aspartate, and N 10 ‑formyltetrahydrofolate (THF). Inosine monophosphate (IMP), the product of the pathway, is a purine nucleotide that can be converted to either AMP or GMP. The structure of the base is labeled according to the numbering convention for purines. Identify the direct source of each atom in the purine ring of IMP.

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?

Why are some people more concerned about shark survival than about shark attacks?