Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Aerobic respiration is defined as the chemical reactions in cells that use oxygen to break down nutrient molecules to release a relatively large amount of energy.
The primary nutrient molecule used is glucose, which has the chemical formula .
The process involves a series of enzyme-controlled reactions that occur in the cytoplasm (glycolysis) and primarily within the mitochondria.
The energy released is stored in the form of (adenosine triphosphate), which powers cellular processes like protein synthesis, muscle contraction, and active transport.
The waste products of aerobic respiration are carbon dioxide () and water (), which must be excreted from the organism.
Aerobic respiration is much more efficient than anaerobic respiration, yielding significantly more energy per molecule of glucose (approximately ).
📐Formulae
💡Examples
Problem 1:
Calculate the total number of oxygen () molecules required to completely respire molecules of glucose () aerobically.
Solution:
molecules of
Explanation:
According to the balanced chemical equation , the molar ratio of glucose to oxygen is . Therefore, for molecules of glucose, the oxygen required is molecules.
Problem 2:
Identify the number of carbon dioxide molecules produced when of glucose is used in aerobic respiration.
Solution:
of
Explanation:
Based on the equation , one mole of glucose produces moles of . Thus, of .