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  2. Obtain A High Score On The AP Biology Exam With Our Practice Tests & Course.

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  1. AP Biology Review. UNIT I: CHEMISTRY OF LIFE. A. Elements. All life forms made up of matter. All matter made up of elements. Elements. Substances that cannot be broken down into smaller substances by chemical means. B. Essential Elements of Life. 96% of the mass of all living things made up of 4 elements:

  2. Download free-response questions from past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at ssd@info.collegeboard.org.

    • Chemistry of Life. Unit 1 Overview: Chemistry of Life. 4 min read. written by Jillian Holbrook. 1.1. Structure of Water and Hydrogen Bonding.
    • Cell Structure & Function. Unit 2 Overview: Cell Structure and Function. 6 min read. written by Jed Quiaoit. 2.1. Cell Structure: Subcellular Components.
    • Cellular Energetics. Unit 3 Overview: Cellular Energetics. 8 min read. written by Caroline Koffke. 3.1. Enzyme Structure. 5 min read.
    • Cell Communication & Cell Cycle. Unit 4 Overview: Cell Communication and Cell Cycle. 4 min read. written by Annika Tekumulla. 4.1. Cell Communication. 3 min read.
  3. I can describe the monomer that makes up an enzyme. I can describe ways the enzyme changes after binding to a substrate. I can describe why the substrate binds to the enzyme. I can describe the function of an enzyme. I can describe ways an enzyme performs its function. I can explain ways that enzymes affect the rate of biological reactions.

  4. Apr 9, 2020 · 1. Keep track of time. You will have 90 minutes to complete the 6 free response questions on the AP® Biology exam. Because each of the two long-answer questions are more extensive and together are worth over half of the free response section (10 points each), you should plan to spend about 20 minutes on each.

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  6. Starting with the 2024 exam, the layout for the free-response questions (FRQs) will be different from prior exams. For a summary of the changes, and to help you visualize this change to the layout, we’ve applied the 2024 layout to the 2021–2023 AP Biology FRQs. You can find the original scoring guidelines on the past exam questions page.

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