MCAT® Biology

Selected questions
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Structure and Function of Proteins

Begin your MCAT® Biology preparation by studying the structural and functional complexity of proteins. Explore how amino acids combine to form protein structures, how stability is affected by structure, and how enzymes work to affect significant biological reactions.

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Your status is based on your weighted accuracy which accounts for the difficulty of the questions.

Your weighted accuracy is based on your most recent attempts compared to everyone else’s first attempts.

Re-answering questions correctly will improve your weighted average status.

Amino Acids

Learn about amino acids, which are chiral molecules with multiple ionizable functional groups whose form changes depending on the pH level. Additionally, learn how amino acids bond to form proteins.
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Protein Structure

Discover the different levels of protein structure, which interactions and bonds are involved, and what causes a loss of protein structure.
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Control of Enzyme Activity

Enzymes use intricate and controlled processes to catalyze otherwise difficult chemical reactions. Learn how reactions are regulated and inhibited through enzyme kinetics.
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Transmission of Genetic Information

Investigate how DNA is transcribed to form mRNA and translated to synthesize proteins that result in varied gene expression. Explore DNA’s replication and repair processes, the significance of its constituent subcomponents, and how it controls for gene expression differently in eukaryotes and prokaryotes. Finally, study the DNA technologies that assist researchers in cloning and genetic research.

CompletionAccuracy

Accuracy is based on your most recent attempt.

Status

Your status is based on your weighted accuracy which accounts for the difficulty of the questions.

Your weighted accuracy is based on your most recent attempts compared to everyone else’s first attempts.

Re-answering questions correctly will improve your weighted average status.

DNA Replication

Analyze, on a molecular level, how DNA copies itself semi-conservatively with specific enzymes and Okazaki fragments.
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Transmission of Heritable Information

Study how DNA is transferred across generations via Mendelian genetics. Which deviations from Mendelian genetics can occur during DNA transmission? How do mutations create genetic variation in populations, and how do these affect natural selection?

CompletionAccuracy

Accuracy is based on your most recent attempt.

Status

Your status is based on your weighted accuracy which accounts for the difficulty of the questions.

Your weighted accuracy is based on your most recent attempts compared to everyone else’s first attempts.

Re-answering questions correctly will improve your weighted average status.

Evidence that DNA is Genetic Material

Using historical experimentation and data, reinforce the fact that DNA is the genetic material shared among all living things.
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Processes of Cell Division, Differentiation, and Specialization

Apply your understanding of cell processes to the study of cell and nuclear division, and compare mitosis and meiosis. Which pathways are responsible for cell differentiation and specialization? How are cell cycle control and cancer related?

CompletionAccuracy

Accuracy is based on your most recent attempt.

Status

Your status is based on your weighted accuracy which accounts for the difficulty of the questions.

Your weighted accuracy is based on your most recent attempts compared to everyone else’s first attempts.

Re-answering questions correctly will improve your weighted average status.

Mitosis

Learn how cells grow, divide, and regulate themselves to prevent cancer formation.
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Reproductive System

Analyze how organisms transmit their DNA to future generations as well as the distinctions between sperm and ovum development.
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Embryogenesis

How does one grow from a single cell to a living, breathing human being? Learn about the stages and key milestones of embryonic development from fertilization to birth.
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Mechanisms of Development

Discover how the simple "on and off" button of key genes can impact not only how an organism develops, but also how it ages.
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Structure and Integrative Functions of the Main Organ Systems

In this final theme, study the structure and function of the major organ systems in the human body: circulatory, respiratory, digestive, immune, lymphatic, muscular, skeletal, and reproductive. Learn how these interconnected systems react to internal and external stimuli to maintain equilibrium.

CompletionAccuracy

Accuracy is based on your most recent attempt.

Status

Your status is based on your weighted accuracy which accounts for the difficulty of the questions.

Your weighted accuracy is based on your most recent attempts compared to everyone else’s first attempts.

Re-answering questions correctly will improve your weighted average status.

Respiratory System

From alveolar structure to the biochemistry of gas exchange, learn about how the respiratory system works and allows us to breathe.
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Circulatory System

Travel through the system whose function is tightly regulated to efficiently transport oxygen, nutrients, and waste through our bodies.
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Digestive System

Everything ingested has to go somewhere. Review how your body turns food into various forms of energy or waste.
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Excretory System

Study the mechanisms of kidney function, as well as how those mechanisms are regulated to maintain osmotic homeostasis.
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Reproductive System

Explore the complex regulation of male and female reproductive structures and functions.
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Muscle System

Learn how muscles work, from sub-cellular mechanisms to whole-muscle function, to move us through our environment.
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Skeletal System

Our skeletons provide an anchor for muscular movement. Analyze how our bones are built and maintained.
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