ATP is consumed or made at different points during glucose respiration in aerobic conditions. Fill in the table to indicate whether ATP is used or produced at each stage of respiration. Write either YES or NO in each box.
An experiment was done to investigate the effect of epicatechin on mitochondrial respiration in mice. Epicatechin is a compound found naturally in cocoa beans and so is present in chocolate. This experiment used two groups of mice, group A and group B. Group A was given water containing epicatechin, twice a day for 15 days. Group B was given water without epicatechin, twice a day for 15 days. After 15 days, the structure of mitochondria from striated muscle cells in both groups of mice was examined. For each mouse, the surface area of the inner membrane of the mitochondria was divided by the surface area of the outer membrane to give a ratio. Table 4.1 shows the mean ratios for the two groups of mice. The mice in group A were able to exercise longer than the mice in group B.