Cellular Respiration Quiz

Mitochondria are a type of organelle found in the cytoplasm of eukaryotic cells. They oxidize sugars and fats to produce energy in a process called respiration. A mitochondrion has two membranes, a smooth outer membrane and a folded inner membrane. The folds of the inner membrane are called cristae, and it is here that the chemical reactions to produce energy take place. CNRI/Science Photo Library/Getty Images

Cellular Respiration Quiz

The energy required to power living cells comes from the sun. Plants capture this energy and convert it to organic molecules. Animals in turn, can gain this energy by eating plants or other animals. The energy that powers our cells is obtained from the foods we eat.

The most efficient way for cells to harvest energy stored in food is through cellular respiration. Glucose, derived from food, is broken down during cellular respiration to provide energy in the form of ATP and heat. Cellular respiration has three main stages: glycolysis, the citric acid cycle, and electron transport.

In glycolysis, glucose is split into two molecules. This process occurs in the cell's cytoplasm. The next stage of cellular respiration, the citric acid cycle, occurs in the matrix of eukaryotic cell mitochondria. In this stage, two ATP molecules along with high energy molecules (NADH and FADH2) are produced. NADH and FADH2 carry electrons on to the electron transport system. In the electron transport stage, ATP is produced by oxidative phosphorylation. In oxidative phosphorylation, enzymes oxidize nutrients resulting in the release of energy. This energy is use to convert ADP to ATP. Electron transport also occurs in mitochondria.

Cellular Respiration Quiz

Do you know which stage of cellular respiration produces the most ATP molecules? Test your knowledge of cellular respiration. To take the Cellular Respiration Quiz, simply click on the "Start The Quiz" link below and select the correct answer for each question. JavaScript must be enabled to view this quiz.


To learn more about cellular respiration before taking the quiz, visit the following pages.