<span>
One of the most important protective factors for drug use is</span> believing that there are strong sanctions against substance abuse at school.
Scientists start with general observation and then make a hypothesis
Often these molecules are carbohydrates, attached to certain lipids, or also I believe are called as glycolipids. These are marker molecules and are used to distinguish cells from each other. As cells can differentiate from one another based on the composition of the carbohydrates present on the lipids, I believe.
