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  1. Questions 1 and 2 are long free-response questions that require about 25 minutes each to answer. Questions 3 through 6 are short free-response questions that require about 10 minutes each to answer. Read each question carefully and completely.

  2. Download free-response questions from past AP Biology exams, along with scoring guidelines, sample responses from exam takers, and scoring distributions.

    • point
    • Total for part (a)
    • point
    • Question 1

    The Na+ /K + ATPase pumps ions against their concentration gradients. This requires an input of (metabolic) energy.

    (b) Identify a dependent variable in the experiment represented in Figure 1. • The number of cells Justify the use of normal human kidney NHK cells as a control in the experiments. Accept one of the following: It allows the scientists to determine the effect of PKD on the cells’ responses to (various concentrations of) ouabain. It allows the scie...

    point point Accept one of the following: Increasing concentrations of ouabain result in decreasing ATPase activity (in both types of cells). There is an inverse relationship/negative correlation between the concentration of ouabain and the ATPase activity (in both types of cells).

    Note: Student samples are quoted verbatim and may contain spelling and grammatical errors.

  3. Explore the wonders of biology Access easy-to-understand explanations and practical examples on key biology topics, from cells to ecosystems. Learn at your own pace with bite-sized, verified content.

  4. Quiz yourself with questions and answers for AP Biology 2021-2022 Semester 1 Final Exam (FRQ), so you can be ready for test day. Explore quizzes and practice tests created by teachers and students or create one from your course material.

  5. Study with Quizlet and memorize flashcards containing terms like Water characteristics, Surface Tension, Specific Heat and more.

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  7. This AP Biology Review Guide is a BEAST, but it walks through the entire Course & Exam Description (CED) with I can statements, questions, and practice multiple choice/free response for each unit. Plus, new this year - explanations for all of the multiple choice questions.

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