If there are to many people people might lose spacing for houses and food would be a completion in the future. Also schools would be overcrowded
This is a true statement.
The levels of organization are a follows:
Atomic - these are the elements
Molecular - atoms of various elements bonded together
Cellular - composed of various molecules
Tissues - collections of cells that work together to perform specific functions
Organs - collections of tissues that work together to perform specific functions
Organ systems - collections of organs that work together to perform specific functions
Organism - a collection of organ systems working together to perform specific functions.
Answer:
reduce NAD+ and FAD.
Explanation:
In the Krebs cycle the carbons donated by the acetyl group are oxidized to CO2 and the electrons pass to the electron transporters. As in glycolysis, a specific enzyme is involved in each step. Coenzyme A is the link between the oxidation of pyruvic acid and the Krebs cycle. In the course of these steps, some of the energy released by the oxidation of the CH and CC bonds is used to convert ADP to ATP (one molecule per cycle), and part is <u>used to produce NADH and H + from NAD</u> (three molecules per cycle). In addition, <u>a fraction of the energy is used to reduce a second electron transporter, the FAD</u>. For each turn of the cycle, a molecule of FADH2 is formed from FAD. O2 is not required for the Krebs cycle: <u>electrons and protons removed in carbon oxidation are accepted by NAD + and FAD</u>. It takes two turns of the cycle to complete the oxidation of a glucose molecule. Thus, the total energy efficiency of the <u>Krebs cycle for one glucose molecule is two molecules of ATP, six molecules of NADH and two molecules of FADH2.
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