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Published byBelinda Fitzgerald Modified over 9 years ago
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Energy Use
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What is the main original source of energy?
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The sun
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What is this graph showing?
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Enzymes lower the energy needed by the cell.
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What is the formula for photosynthesis?
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6CO 2 + 6H 2 O ---Sunlight---> C 6 H 12 O 6 + 6O 2
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What organelle does photosynthesis take place in?
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The chloroplast
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What gas does photosynthesis need as a reactant?
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CO2
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What type of organism is a plant?
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An autotroph
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What type of organisms need the cellular respiration process?
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Any organism that needs to break down food molecules to release stored energy.
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What biomolecule are enzymes or catalysts?
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proteins
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When do plants go through cellular respiration?
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When they are germinating, before they make leaves for photosynthesis
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In a human, what is the optimal body temperature by which enzymes will work?
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98.6 degrees F
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What two types of energy are required during digestion?
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Mechanical and chemical
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What is an example of mechanical digestion?
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Chewing peristalsis
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Give and example of how chemicals help speed digestion.
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Amylase=carbohydrates Lipase=lipids
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What would happen if the enzymes in your body became too hot from a high temperature?
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They would change shape, hence the active site would be destroyed.
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How could catalysts be sped up?
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Increase the levels of enzymes.
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What are competitive and non-competitive inhibitors?
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They prevent substrates from contacting the enzyme.
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What is an induced fit and lock and key model?
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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).
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What other organs help produce enzymes along the digestive tract?
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The pancreas
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Where does food get absorbed along the digestive tract?
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The small intestine
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Where does the food go once it is absorbed from the small intestine?
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Into the bloodstream-> to the cells
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What is required for cellular respiration?
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C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy
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What organelle does cellular respiration take place in?
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The mitochondria
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Once cellular waste is produced, where does it need to go?
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Back into the bloodstream then to the kidneys to be filtered out into urine. Into the bloodstream ->to the lungs-> then exhaled
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Why do we need energy?
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To grow (mitosis and meiosis) To move Transport substances across cell membranes
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