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Chemical Reactions And Enzymes

Test Description: Chemical reactions in the body (2.4)

Instructions: Answer all questions to get your test result.

1) Identify the reactant(s) shown here: CO2 + H2O → H2CO3.

AH2O + H2CO3 BCO2 + H2O CH2CO3 DCO2

2) The energy needed to get a reaction started is the ___.

Aadhesion energy Bactivation energy Ccohesion energy Dchemical energy

3) Which of the following statements is true about catalysts?

ACatalysts are used up during a chemical reaction BCatalysts slow down the rate of chemical reactions CCatalysts lower the activation energy of a chemical reaction DAll catalysts are enzymes

4) The elements or compounds that go into a chemical reaction are ____.

Aproducts Bcatalysts Creactants Disotopes

5) Which of the following statements about enzymes is NOT true?

AThe place where a substrate connects with an enzyme is called the substrate site BEnzymes work best at a specified pH CThe shape of an enzyme allows it to work with a particular substrate DEnzymes are proteins

6) Which of the following is LEAST likely to affect the rate of enzyme activity?

Aamount of the substrate BpH Cregulatory molecules Dtemperature

7) Chemical reactions cannot occur without a catalyst.

Atrue Bfalse

8) Chemical reactions that absorb energy MUST have a source of energy to occur

Afalse Btrue

9) Catalase (found in liver cells) is an enzyme that breaks down H2O2

Atrue Bfalse

10) The elements or compounds that are created as a result of a chemical reaction are called ____

Aproducts Bactivation energy Cenzymes Dreactants

*select an answer for all questions

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