Which of the following is the most abundant inorganic substance in cells?

The _____ system is responsible for body movements, maintenance of posture, and production of body heat.

Which nitrogen base always pairs with cytosine in both DNA and RNA?

Of the items listed, which is not required for the maintenance of life (in humans)?

For each glucose molecule metabolized that undergoes all steps of cellular respiration, the total number of ATP molecules formed is ______.

_____ is a process by which a molecule gains electrons.  In cellular respiration, this happens to oxygen, which results is the production of water.

An atom is electrically neutral because the number of

Human muscle cells undergo ______ when there is an oxygen debt.  This causes muscle soreness and fatigue if the chemical produced accumulates.

In cellular respiration, _______ is oxidized (used a fuel), meaning that electrons are released from this molecule.

Which of the following is not characteristic of carbohydrates?