The reactions of glycolysis occur in the cell's ; the reactions of the krebs (citric acid) cycle occur in the a. cytoplasm, mitochondria b. cytoplasm, cytoplasm c. mitochondria, mitochondria d. mitochondria, cytoplasm

Hi there!

Interesting question about cellular respiration & photosynthesis.

Glycolysis is the first step when it comes to breaking down glucose (6 carbon) into pyruvic acid (3 carbon). Glycolysis occurs in the cytoplasm. On the other hand, the Krebs cycle, which I like to call the tricarboxylic cycle, is a group of chemical reactions that take Oxygen (O2) and turn it into Carbon dioxide (CO2) and water (H2O) as waste products. The Krebs cycle occurs in the mitochondria.

Therefore, your answer should be A. cytoplasm, mitochondria.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.