Modeling Chemical Reactions in Ecosystems

What are the reactants in the process of photosynthesis?

• Glucose and oxygen

• Water and carbon dioxide

• Oxygen and carbon dioxide

• Water and glucose

What is produced during photosynthesis?

• Oxygen

• Glucose

• Carbon dioxide

• Water

What is the main function of cellular respiration in yeast?

• To produce light

• To release energy

• To create oxygen

• To absorb water

What happens to glucose molecules during yeast fermentation?

• They become water and oxygen

• They become ethanol and carbon dioxide

• They become starch and water

• They become protein and nitrogen

What process is used by yeast when there is enough oxygen available?

• Fermentation

• Cellular respiration

• Photosynthesis

• Combustion

During class, students set up a demonstration of yeast as follows:

Tube 1 = Control (yeast only)

Tube 2 = Yeast + Dextrose

Tube 3 = Yeast + Sucrose

Tube 4 = Yeast + Cornstarch

Why were balloons added to each test tube?

• To see which test tube produced the most oxygen

• To see which test tube produced the most ATP

• To see which test tube produced the most hydrogen

• To see which test tube produced the most carbon dioxide

Glucose has 6 Carbon atoms. Based on the equation for photosynthesis, where did glucose get its carbon atoms from?

• Water

• Oxygen

• ATP

• Carbon dioxide

Mitochondria are...

• The location in cells where photosynthesis happens
• Kidney beans
• The location in cells where cellular respiration happens
• A type of pigment used for cellular respiration

Identify each of the following as a reactant or product of cellular respiration.

• Produces energy in cells

• 
• The main energy molecule for cells

• 
• The products of cellular respiration

• 
• The organelles in which cellular respiration occurs

• 
• The reactants of cellular respiration

•