Chemical Reactions and Enzymes
Authored by Sarah Scheer
Chemistry
9th Grade
NGSS covered
Used 20+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a competitive inhibitor?
A competitive inhibitor is a type of enzyme that binds to a different site on the enzyme than the active site.
A competitive inhibitor is a type of enzyme that enhances the activity of the substrate.
A competitive inhibitor is a type of enzyme that only inhibits the activity of non-competitive inhibitors.
A competitive inhibitor is a type of enzyme inhibitor that competes with the substrate for binding to the active site of the enzyme.
Answer explanation
A competitive inhibitor is an enzyme inhibitor that competes with the substrate for binding to the active site of the enzyme.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of reaction is a catabolic reaction?
A catabolic reaction is a decomposition reaction.
A catabolic reaction is an exothermic reaction.
A catabolic reaction is a redox reaction.
A catabolic reaction is a synthesis reaction.
Answer explanation
A catabolic reaction is a decomposition reaction, where substances are broken down. This is the correct choice.
Tags
NGSS.HS-PS1-4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of reaction is an anabolic reaction?
Decomposition reaction
Reduction reaction
Oxidation reaction
Synthesis reaction
Answer explanation
An anabolic reaction is a synthesis reaction where smaller molecules are combined to form larger molecules. In this case, the correct choice is 'Synthesis reaction'.
Tags
NGSS.HS-LS1-5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of reaction is an endothermic reaction?
An endothermic reaction is a type of reaction that occurs at extremely high temperatures.
An endothermic reaction is a type of reaction that does not involve heat.
An endothermic reaction is a type of reaction that releases heat to its surroundings.
An endothermic reaction is a type of reaction that absorbs heat from its surroundings.
Answer explanation
An endothermic reaction is a type of reaction that absorbs heat from its surroundings.
Tags
NGSS.HS-PS1-4
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of reaction is an exothermic reaction?
An exothermic reaction is a reaction that releases energy.
An exothermic reaction is a reaction that produces light.
An exothermic reaction is a reaction that does not release energy.
An exothermic reaction is a reaction that absorbs energy.
Answer explanation
An exothermic reaction is a reaction that releases energy.
Tags
NGSS.HS-PS1-4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are enzymes?
Enzymes are inorganic molecules that have no effect on chemical reactions.
Enzymes are biological molecules that act as catalysts and help speed up chemical reactions in living organisms.
Enzymes are only found in plants and not in animals.
Enzymes are harmful substances that damage living organisms.
Answer explanation
Enzymes are biological catalysts that accelerate chemical reactions in living organisms.
Tags
NGSS.HS-LS2-3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does a competitive inhibitor affect enzyme activity?
It increases the enzyme's activity by binding to the active site and enhancing substrate binding.
It has no effect on the enzyme's activity.
It completely inhibits the enzyme's activity by destroying the active site.
It reduces the enzyme's activity by binding to the active site and preventing substrate binding.
Answer explanation
A competitive inhibitor reduces enzyme activity by binding to the active site and preventing substrate binding.
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