DNA carries the hereditary and functional information

Enzymes prefer lighter isotopes compared to heavier isotopes

DNA is always synthesized in the 3'-to-5' direction

Best available electron acceptor is hydrogen

For each organism, there exists at least one niche in which that organism is most successful

Oxygen minimum zones (OMZs) can occur in high-BOD regions

Insulin is produced in genetically modified mice

Enzymes are chemical catalysts that reduce activation energy

Human metabolism is 

Which gas was not present in earth’s prebiotic atmosphere?