Cellular Respiration and Glycolysis Concepts

Where does the first step of breaking down glucose, called glycolysis, happen inside a cell?

• The nucleus

• The mitochondria

• The cytoplasm (cytosol)

• The cell wall

What is the main purpose of glycolysis?

• To build new proteins

• To split a 6-carbon glucose molecule into two smaller 3-carbon molecules

• To store water in the cell

• To help the cell move

Besides the smaller molecules made from glucose, what other important energy-carrying molecules are produced during glycolysis?

• Oxygen and carbon dioxide

• Water and salt

• ATP and NADH

• Sugars and fats

If there is no oxygen available in a cell, what process can pyruvate go through instead of continuing with cellular respiration?

• Photosynthesis

• Fermentation

• Digestion

• Respiration

What molecule is created when Acetyl-CoA joins with oxaloacetic acid at the beginning of the Citric Acid Cycle?

• Pyruvate

• Citric acid

• Carbon dioxide

• Glucose

What important energy-carrying molecule is made many times during the Citric Acid Cycle?

• Carbon Dioxide

• Water

• NADH

• Oxygen

About how many ATP molecules are made in total from one glucose molecule during all parts of cellular respiration?

• 2 ATP

• 4 ATP

• 10 ATP

• 29-30 ATP

Where in the cell does the Citric Acid Cycle happen?

• Cytosol

• Cell membrane

• Mitochondrial matrix

• Nucleus