SCIENCE
RESPIRATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
The stage happens in cytoplasm.
|
|
|
The stage happens in mitochondria.
|
|
|
Oxygen combines with small molecules.
|
|
|
Glucose is broken down.
|
|
|
Energy is released.
|
Detailed explanation-1: -AI Recommended Answer: The first stage of cellular respiration happens in cytoplasm. Oxygen combines with the small molecules to create energy.
Detailed explanation-2: -The first stage of cellular respiration is glycolysis. This process is shown in the top box in Figure 5.9. 3 showing a 6-carbon molecule being broken down into two 3-carbon pyruvate molecules. ATP is produced in this process which takes place in the cytosol of the cytoplasm.
Detailed explanation-3: -The first stage of cellular respiration, called glycolysis, takes place in the cytoplasm. In this step, enzymes split a molecule of glucose into two molecules of pyruvate, which releases energy that is transferred to ATP.
Detailed explanation-4: -Glycolysis, which is the first step in all types of cellular respiration is anaerobic and does not require oxygen. If oxygen is present, the pathway will continue on to the Krebs cycle and oxidative phosphorylation. However, if oxygen is not present, some organisms can undergo fermentation to continually produce ATP.
Detailed explanation-5: -Thus the correct order of the stages in cellular respiration is: Glycolysis-Oxidative decarboxylation-Krebs cycle-Electron transport chain-Oxidative phosphorylation.