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Marlow Works

AP Biology / Unit 1

Unit 1 · 8–11%

Chemistry of Life

Life’s chemistry is ordinary matter arranged so that structure does work.

Start first lessonUnit practice

Topics

  • Water and hydrogen bonding
  • Carbon and functional groups
  • Macromolecules
  • Structure and function

Lessons

Key terms

Original practice

Marlow Works questions. If this unit does not have its own items yet, you will see other questions from the same course.

1 of 3Membranes · medium · multiple choice

A cell’s surface-area-to-volume ratio is important because it affects:

Original Marlow Works item — not a College Board question.

Take your time—this is practice, not a test.

Review checklist

  1. 01Link a water property to a living process, not only to a definition.
  2. 02Name the monomers of carbohydrates, proteins, and nucleic acids.
  3. 03Predict how a shape change could change a function.

Related resources

External links with reuse status. Marlow Works is independent and does not copy restricted exam or textbook material.

  • Official / link only

    AP Biology course page

    Official eight-unit framework, science practices, and lab resources.

    College Board · All rights reserved · accessed 2026-10-01

    Open source

  • Reference only — do not copy

    OpenStax Biology 2e

    Biology reference with commercial-use restrictions on the current publisher page.

    OpenStax · CC BY-NC-SA 4.0 with additional restrictions · accessed 2026-10-01

    Link only unless permission is obtained.

    Open source