Warm-Up Answer the following questions in complete sentences. What is the bond called that connects amino acids? The bond that connects amino acids is a….

UNIT 3 Enzymes

All happens faster if an enzyme is involved! UNIT 3 Enzymes Energy Enzymes make chemical reactions happen faster. (a reactant becomes a product). Food becomes O2 becomes* CO2 Alcohol becomes All happens faster if an enzyme is involved! waste in urine *actually not true, wait until we talk about Photosynthesis and Cellular Respiration

UNIT 3 Enzymes Enzymes make chemical reactions happen faster. (a reactant becomes a product). Reactant = substrate Energy Food becomes Reactant (substrate) Product

UNIT 3 Enzymes Enzymes make chemical reactions happen faster. (a reactant becomes a product). Reactant = substrate Specific enzymes react with specific substrates by binding (attaching) to them. Hmm… Mr. Enzyme Food O2 Alcohol Reactant (substrate) Product

UNIT 3 Enzymes Enzymes make chemical reactions happen faster. (a reactant becomes a product). Reactant = substrate Specific enzymes react with specific substrates by binding (attaching) to them. Mr. Enzyme Food I choose you, O2! O2 Alcohol Reactant (substrate) Product

UNIT 3 Enzymes Enzymes make chemical reactions happen faster. (a reactant becomes a product). Reactant = substrate Specific enzymes react with specific substrates by binding (attaching) to them. The substrate fits in the enzyme like a key in a lock.

UNIT 3 Enzymes Enzymes make chemical reactions happen faster. (a reactant becomes a product). Reactant = substrate Specific enzymes react with specific substrates by binding (attaching) to them. The substrate fits in the enzyme like a key in a lock. The part of the enzyme that fits with the substrate is called the active site. active site active site active site

Summarize Your Notes-2 minutes In one to two complete sentences, summarize the relationship between substrates, enzymes and active site. Please use the words “substrate,” “enzymes,” and “active site” in your sentence(s).

Enzymes 3 “Catalyze” = “speed up a reaction” UNIT With enzyme Without enzyme Amount of product Time Sometimes 1,000 times faster!

Enzymes 3 “Catalyze” = “speed up a reaction” UNIT 3 Enzymes “Catalyze” = “speed up a reaction” The energy required to start a reaction is the activation energy. Energy of Reaction Activation Energy reactant product Time

Enzymes 3 “Catalyze” = “speed up a reaction” UNIT 3 Enzymes “Catalyze” = “speed up a reaction” The energy required to start a reaction is the activation energy. Enzymes catalyze reactions by lowering the activation energy. Energy of Reaction Activation Energy w/ enzyme reactant product Time

Enzymes 3 “Catalyze” = “speed up a reaction” UNIT 3 Enzymes “Catalyze” = “speed up a reaction” The energy required to start a reaction is the activation energy. Enzymes catalyze reactions by lowering the activation energy. If the temperature rises too high, enzymes become denatured and no longer work.

Enzymes 3 “Catalyze” = “speed up a reaction” UNIT 3 Enzymes “Catalyze” = “speed up a reaction” The energy required to start a reaction is the activation energy. Enzymes catalyze reactions by lowering the activation energy. If the temperature rises too high, enzymes become denatured and no longer work.

Summarize Your Notes- 3 minutes In one to two complete sentences, summarize the relationship between enzymes, catalyze, activation energy, denaturation. Please use the words “enzymes,” “catalyze,” “activation energy” and “denaturation” in your sentence(s).

UNIT 3 Enzyme Video Watch the video, and complete the following sentence in your notebook: The substrate binds to the enzyme at the ________ _________. https://www.youtube.com/watch?v=NdMVRL4oaUo

Enzyme & Substrate Cutout Activity Cut out each of the four different Pac-Man’s and each of their substrates. On each Pac-Man, write “Enzyme (Protein)” and label the “Active Site” On the others, write “Substrate” Paste the Enzymes and Substrates into your notebook

Closure Answer the following question in a complete sentence: Name/Nombre Date/Fecha Period ____ Answer the following question in a complete sentence: Describe what it means for an enzyme to be specific to a substrate. Suggested sentence stem: An enzyme is “specific” to a substrate because…