What is the best way to prepare for an AP® exam? Learners become familiar with the AP® Biology exam by completing a full-length practice exam. The AP® test prep by the College Board contains multiple choice, grid-in, and free-response...

Practice for the MCAT with these questions based on the given graph about biochemistry changes after death.

Take an interactive quiz over biochemistry and organic chemistry. After completing the quiz, check your score, and then revisit any incorrect question for further review.

Questions related to controlling enzyme activity.

Take this interactive, multiple-choice quiz over the organic molecules important to life, then review your score and any missed questions at the end.

Do you understand the fundamental concepts of metabolism? You can find out by going through the quizzes and accompanying tutorials of this resource.

The purpose of this set of problems is to give you a basic understanding of some of the fundamental concepts of metabolism. The correct answers for the multiple choices problems are reinforced with a brief explanation and the incorrect...

In this module you can learn how certain carbohydrate pathways are reciprocally affected by insulin and glucagon. The correct answers for the multiple choices problems are reinforced with a brief explanation and the incorrect answers are...

In this module you will be able to test your understanding of how light energy is converted into different forms of chemical energy during photosynthesis, to review the equations for the light reactions of photosynthesis, and to explore...

In this set of problems you can review the location and overall reactions of carbohydrate biosynthesis during photosynthesis, and to understand the difference between C3 and C4 plant leaf anatomy and pathways for carbohydrate...

Two multiple-choice quizzes, one on the processes and types of biological molecules, the other on the structure and replication of DNA.

Try these twenty multiple-choice questions to review the concepts of the chemistry embedded in biology. Each question has a clickable hint, and the entire assessment is self-checking.

Try these five multiple-choice questions about the building blocks of life. The quiz is self-checking, and provides hints to the student if needed.

Take an interactive quiz over the molecules of life. After completing the quiz, check your score, and then revisit any incorrect question for further review.

Take an interactive quiz over organic compounds. After completing the quiz, check your score, and then revisit any incorrect question for further review.

How much do you know about biological macromolecules?

Analysis of Image Production by the Human Eye.

On this site, students can test their knowledge on carbohydrates!

Practice for the MCAT with these questions on bioenergetics.

Practice questions related to how organisms maintain constant pH range acids.

Questions pertaining to nucleic acids, lipids, and carbohydrates.

An online quiz with nine questions about the chemistry of the human body and of other life. Has ads, which may be distracting.

A part of a larger quiz on cellular respiration as a whole. If you miss the question, you'll get a tutorial on the subject. If you get it right, you're smart.

Answer the question wrong and you will get a brief tutorial in the right direction. Answer it right and you must know what you are talking about. Part of a larger quiz on cellular respiration.