Unit 3: Cellular Energetics

Learning Objective

You will be able to:

• Describe the properties of enzymes including structure, active site interactions with substrates, and the induced fit model.

• Explain how enzymes effect the rate of biological reactions.

• Explain how changes to the structure of an enzyme may affect its function.

• Explain how the cellular environment affects enzyme activity.

• Describe the role of energy in living organisms.

• Describe the photosynthetic processes that allow organisms to capture and store energy. 

• Explain how cells capture energy from light and transfer it to biological molecules for storage and use. 

• Describe the processes that allow organisms to use energy stored in biological macromolecules. (Fermentation and cellular respiration)

• Explain how cells obtain energy from biological macromolecules in order to power cellular functions. (Major stages of cellular respiration and fermentation)

AP Bio Course and Exam Description for Unit 3.

Slides

Homework

Lab Exercises

• 3.1 Enzyme Activity (Catalase Lab)

Rather than a buffer, we'll make the potato extract with ice to help slow the breakdown of the enzyme.

We will dilute the peroxide and just run 2.0%, 1.5%, 1.0%, 0.8%, 0.6%, 0.4%, and 0.2% peroxide. I'll take care of the dilution of the enzyme when making it, so you will not need to do any dilution (and we're just running the substrate dilution portion of the experiment, so there is no need to report this as anything other than potato extract as we'll have just one concentration in our experiment). We'll run a 0% control on the front bench. Since the experiment is otherwise the same, we'll just have each group run one concentration of peroxide and then collect data for the class. Each group will get times for 10 filter paper disks.

• 3.2 Photosynthesis (Floating Leaf Disk data analysis)  -- The video is similar, but not identical to the data set. Read the document.

• 3.3 Respiration (Pea respiration data analysis) -- The video is similar, but not identical to the data set. Read the document.

Links and Embedded Videos

Enzymatic! (Review Game)