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15
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What are reactions that absorb energy called?
Endothermic reactions
Physical reactions
Enzymatic reactions
Exothermic reactions
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15
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What do enzymes do in digestion?
Make new DNA strands
Store oxygen
Absorb light energy
Break down food molecules into smaller units
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Why are enzymes vital for life?
They make cells bigger
They cool the body
They help reactions occur fast enough to sustain life
They remove carbon dioxide
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What is the âlock and keyâ model?
Energy stored in bonds
Enzymes work for all molecules
Enzyme fits specific molecules to catalyze a reaction
Enzyme shape has no importance
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15
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What are enzymes?
Biological catalysts that speed up reactions
Energy sources in cells
Chemicals that slow down reactions
Acids found in the stomach
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What are reactions that release energy called?
Enzymatic reactions
Exothermic reactions
Mechanical reactions
Endothermic reactions
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15
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What enzyme breaks starch into maltose?
Protease
Amylase
Lipase
Cellulase
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What are substances formed in a chemical reaction called?
Compounds
Reactants
Products
Mixtures
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What is activation energy?
Energy stored in bonds
Energy released after a reaction
Energy needed to start a reaction
Total energy in products
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15
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What is the general equation for an endothermic reaction?
Products â Reactants + Energy
Reactants â Products + Energy
Energy â Reactants + Products
Reactants + Energy â Products
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15
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What is metabolism?
Only endothermic reactions
Movement of energy through space
Sum of all biochemical reactions in an organism
Only digestion reactions
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baam
Lose 20 points!
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shark
Other team loses 5 points!
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shark
Other team loses 5 points!
Okay!
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banana
Go to last place!
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trap
No points!
Oops!
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shark
Other team loses 15 points!
Okay!
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fairy
Take points!
5
10
15
20
25
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thief
Give points!
5
10
15
20
25
15
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What is the general equation for an exothermic reaction?
Products â Reactants + Energy
Reactants + Energy â Products
Energy â Products + Reactants
Reactants â Products + Energy
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15
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What happens if enzymes lose their shape?
They speed up more reactions
They change into products
They become denatured and stop working
They make new enzymes
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seesaw
Swap points!
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rocket
Go to first place!
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fairy
Take points!
5
10
15
20
25
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lifesaver
Give 10 points!
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