Mitochondria are the energy centers of the eukaryotic cells. In these organelles, ATP (the energy coin of the cell) is produced by the oxidation of pyruvate (Krebs cycle) and oxidative phosphorylation.
- Based on this information, malfunction in MITOCHONDRIA is most likely responsible for Leigh's disease.
- Cellular respiration is series of metabolic reactions by which eukaryotic cells produce energy in the form of ATP from foods and oxygen.
- Cellular respiration has three main stages: glycolysis, the Krebs cycle and oxidative phosphorylation.
- Glycolysis occurs in the cytoplasm, whereas the Krebs cycle and oxidative phosphorylation occur in the mitochondria.
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The answer is C.
It is not true that CO2 is released during photosynthesis, rather its the opposite. Carbon dioxide is a raw material for the production of  starches and cellulose through photosynthesis. Atmospheric carbon dioxide is captured during the light dependent reactions of photosynthesis then used for the production of starch, glucose and cellulose in the light independent reactions (Calvin cycle)  of photosynthesis.
In aerobic cellular respiration, oxygen rather than Carbon dioxide is a requirement because it is needed as the terminal electron acceptor in the production of ATP.
 
        
                    
             
        
        
        
The main dietary factor associated with elevated blood cholesterol is saturated fat.
<h3>
What about saturated fat?</h3>
- Because they increase the amount of LDL cholesterol in our blood, saturated fats, sometimes known as "bad fats," increase the risk of cardiovascular disorders (including heart disease and stroke). 
- Cholesterol that is circulated in the blood. 
- The majority of this cholesterol is produced by the body, however some is also absorbed from the meals you eat. 
- Even if they include fat, foods derived from plants never contain cholesterol.
- Only foods from animals do. Low density lipoproteins are able to transport cholesterol. 
- Dietary fat, particularly saturated and trans fats, may increase LDL and total cholesterol levels in the blood. 
- Blood cholesterol levels may be lowered by substituting polyunsaturated and monounsaturated fats, particularly olive and canola oil, for some saturated fats.
- When we consume too much saturated fat, the receptors stop functioning as effectively, and blood cholesterol levels rise.
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I'm pretty sure the answer is C, there are 4 nitrogenous bases involved. 
<span>1) Adenine 
2) Guanine 
3) Thymine 
4) Cytosine</span>