Enzyme Lesson

Enzymes need certain environmental conditions in order to function properly.  What happens when enzymes are heated to a high temperature?

• they die

• they denature

• they change their amino acid sequence

• they work better

What is the primary role of enzymes inside of living cells? 

• store genetic information

• store energy

• they help fight infections

• speed up chemical reactions 

Based on their role in the cell, enzymes can also be classified as –

• inhibitors

• catalysts

• sources of energy

• vitamins

Enzymes are able to speed up chemical reactions because they - 

• increase the temperature inside the cell

• reduce the friction between the reactants

• make the raw materials more chemically reactive

• lower the activation energy of the reaction

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The role of enzymes in the cell is best summarized by which of the following statements?

• Enzymes control the rate and process of chemical reactions in our body by helping break and form chemical bonds

• Enzymes carry the genetic information needed for our cells to function.

• Enzymes send electrical signals through the bodies of multicellular organisms.

• Enzymes are the main energy storage molecules within our cells.

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Which of the following conclusions can be drawn from this graph?

• The optimum pH of the enzyme is 6.6.
  

• This enzyme works best in highly acidic environments
  

• The enzyme’s activity increases as pH increases 7.0 to 9.0
  

• The enzyme’s activity is greater around pH of 8.0 .
  

After the enzyme and substrate bind together and perform the reaction, what does the substrate become?

• another substrate

• an enzyme

• a product

• an active site

The enzyme amylase helps the body breakdown starch in food and functions optimally at body temperature (37 C). A young child runs a fever of 40C for 24 hours.  Predict the effect this may have on his digestion.

• Digestion will increase because starch molecules are colliding faster with the enzyme.

• Digestion will increase because enzyme activity improves at higher temperature.

• Digestion will decrease because starch molecules are colliding faster with the enzyme.

• Digestion will decrease because the shape of the enzyme is altered past optimal temperature.

Identify what is labeled with the letter D

• active site

• enzyme

• substrate

• products

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Enzymes are composed of which of the following monomers? 

• amino acids

• proteins

• nucleotides

• monosaccharides

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