is starch present at time zero? should it be present? why or why not?
To determine whether starch is present at time zero, we have to consider the context in which this question is being asked.
Starch is a complex carbohydrate found in many plants. It is typically stored in specialized structures such as seeds, tubers, and grains. In these storage structures, starch serves as a reserve of energy that can be broken down into glucose when needed.
If we are referring to a plant or food source that contains starch, then yes, starch should be present at time zero. It is naturally present in these structures as a form of energy storage.
However, if we are referring to a specific process or experiment, the presence of starch at time zero could depend on various factors. For example, if we are investigating the breakdown of starch over time, it is possible that starch may not be present at time zero due to enzymatic or chemical reactions that have already begun breaking it down into simpler sugars.
In summary, the answer to whether starch is present at time zero depends on the context of the question and the specific scenario being considered.