Energy Use

• What is the main original source of energy?

• The sun

What is this graph showing?

• Enzymes lower the energy needed by the cell.

• What is the formula for photosynthesis?

• 6CO2 + 6H2O ---Sunlight---> C6H12O6 + 6O2

• What organelle does photosynthesis take place in?

• The chloroplast

• What gas does photosynthesis need as a reactant?

• CO2

• What type of organism is a plant?

• An autotroph

• What type of organisms need the cellular respiration process?

• Any organism that needs to break down food molecules to release stored energy.

• What biomolecule are enzymes or catalysts?

• proteins

• When do plants go through cellular respiration?

• When they are germinating, before they make leaves for photosynthesis

• In a human, what is the optimal body temperature by which enzymes will work?

• 98.6 degrees F

• What two types of energy are required during digestion?

• Mechanical and chemical

• What is an example of mechanical digestion?

• Chewing• peristalsis

• Give and example of how chemicals help speed digestion.

• Amylase=carbohydrates• Lipase=lipids

• What would happen if the enzymes in your body became too hot from a high temperature?

• They would change shape, hence the active site would be destroyed.

• How could catalysts be sped up?

• Increase the levels of enzymes.

• What are competitive and non-competitive inhibitors?

• They prevent substrates from contacting the enzyme.

• What is an induced fit and lock and key model?

An enzyme must have its active site fit specifically to the substrate (lock and key). Once it does it puts a firm hold around it (induced fit).

• What other organs help produce enzymes along the digestive tract?

• The pancreas

• Where does food get absorbed along the digestive tract?

• The small intestine

• Where does the food go once it is absorbed from the small intestine?

• Into the bloodstream-> to the cells

• What is required for cellular respiration?

• C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy

• What organelle does cellular respiration take place in?

• The mitochondria

• Once cellular waste is produced, where does it need to go?

• Back into the bloodstream then to the kidneys to be filtered out into urine.

• Into the bloodstream ->to the lungs-> then exhaled

• Why do we need energy?

• To grow (mitosis and meiosis)• To move• Transport substances across cell membranes