Enzyme Study Guide and Mr. Planicka's terms

Energy must be added to cause molecules to react with one another. This energy is called _1)__________________. Enzymes increase/decrease the amount of energy for activation to occur.

1) activation energy

After a protein denatures, is the denatured protein still able to function?

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b. Which enzyme is more active in a human cell? Why?

Enzyme A

8. Explain the relationship between enzymes and the activation energy of a chemical reactions.

Enzymes lowers the amount of activation energy

Label the parts of the diagram. -enzyme, substrate, product, reactants, enzyme-substrate complex

First one: Enzyme with the substrate that fits in Second one: reactants Third picture: products and enzyme substrate complex

Describe what happens when a protein denatures.

It disrupts the normal alpha-helix and beta sheets in a protein.

what is an enzyme?

Large complex protein. Organic catalyst, usually a protein, that speeds a reaction in cells due to its shape.

4. What are enzymes?

Proteins that are a biological catalyst

3. Classify which of the compounds in the reaction below are reactants and which are products . Pb02 +4HC1 ----) PbCh + Ch + 2 H20

REACTANTS ON THE LEFT Pb02 +4HC1 ----) PRODUCTS ARE ON THE RIGHT PbCh + Ch + 2 H20

Progress of Reaction

What goes next to Time?

Substrate

What is Number 1

Reactant

What is Number 2

Energy of activation (Less needed)

What is Number 3

Enzyme

What is Number 4

Activation Energy

What is Number 5

Products

What is Number 6

1.State the term for the amount of energy that is needed for a chemical reaction to occur.

activation energy

Minimum amount of energy required for reactants to form products.

activation energy

amount of energy needed for a chemical reaction to occur

activation energy

10. How do enzymes maintain specificity (think about a lock and key)?

active site. They lock together.

What is the name of the enzyme in the pineapple we are using in this lab?

bromelain

Substance that lowers energy needed to start a chemical reaction.

catalyst

17. What happens to the active site when an enzyme is denatured?

changes shape

What is the protein substrate we are using in this lab?

collagen

7. Name some biological processes that require enzyme activity.

eating, cell division, DNA replication

9. Describe the conditions inside the cell that enable enzymes to be active?

energy must be added to cause molecules to react

Protein that is a biological catalyst.

enzyme

a. Describe the effect that temperature has on the rate of the reaction using the graph above.

increased temperature equals more reaction

For the lab we did what the source for the protein.

pineapple

14. What features do all reactions involving enzymes have in common?

speeds up reactions

Molecule that binds to an enzyme.

substrate

Enzymes are very specific in their action and are named for their ______________

substrates

15. Identify and describe factors that can influence enzyme activity.

temperature change and change in ph

For this lab, what were we trying to investigate

the effect of the temperature on collagen

In your own words, describe what happens to collagen when it is heated.

the jello is made from the pineapple juice but it is the collagen that makes it form

2.Summarize the relationship between enzyme and a substrate.

they link together

5. State the role of enzymes in chemical reactions.

they speed up chemical reactants

Why is water used as a 'juice" in Enzyme experiment 1? Explain

to create the jello