The answer is a ‘series of steps in which enzymes work one
at a time to convert a compound to a related compound’. The intermediate products of metabolic pathways are called metabolites. An example of a metabolic cycle is the Glycolysis and Krebs cycles. The product in each step of the
metabolic pathways becomes the substrate
of the next step in the pathway. There are two types of metabolic pathways;
anabolic and catabolic
There are so many examples for that in different areas, like biology experiment carried out in our lab recently.
Here's one link:https://www.creative-biogene.com/support/Knockout-Cell-Lines-in-Antibody-Screening-and-Validation.html
Answer:
nuclear fusion
Explanation:
When the density and temperature at the core of the gravitationally collapsing nebula reaches values when nuclear fusion is triggered and sustained, that marks the birth of the star.