Question 1
A glass rod charged with +3.2 x 10^-9 C has how many electrons removed?
Correct Answer:
2.0 x 10^10 electrons
Explanation:
To understand how many electrons were removed from the glass rod charged with +3.2 x 10^-9 C, we need to relate the amount of charge to the charge of a single electron. The elementary charge, which is the charge of an electron, is approximately -1.6 x 10^-19 C. When electrons are removed from an object, it becomes positively charged. In this case, the glass rod has a positive charge of +3.2 x 10^-9 C. To find out how many electrons were removed, we need to divide the total charge of the rod by the charge of one electron. The mathematical representation of this would be: Number of electrons removed = Total charge / Charge of one electron = (3.2 x 10^-9 C) / (1.6 x 10^-19 C/electron). Calculating this gives us: Number of electrons removed = (3.2 x 10^-9) / (1.6 x 10^-19) = 2.0 x 10^10 electrons. Thus, the glass rod had approximately 2.0 x 10^10 electrons removed to achieve a charge of +3.2 x 10^-9 C
Question 2
What characterizes saturated fats?
Correct Answer:
They contain no double bonds between carbon atoms.
Explanation:
Saturated fats are characterized by the absence of double bonds between their carbon atoms. This means that all carbon atoms in the fatty acid chains are fully saturated with hydrogen atoms. As a result, saturated fats typically have a straight structure that allows them to pack closely together, which is why they tend to be solid at room temperature. In contrast to saturated fats, unsaturated fats contain one or more double bonds which introduce kinks in the fatty acid chains, preventing them from packing tightly. This structural difference often results in unsaturated fats being liquid at room temperature. Therefore, the defining characteristic of saturated fats is that they do not have any double bonds, making them distinct from other types of fats.
Question 3
What significant contribution did Robert Hooke make to biology?
Correct Answer:
He coined the term "cell."
Explanation:
Robert Hooke made a landmark contribution to biology by coining the term "cell." In his 1665 work titled "Micrographia," he detailed his observations of cork cells under a microscope. Hooke noticed that the structure of the cork resembled small, hollow compartments, which he referred to as "cells" based on the Latin word "cella," meaning small room. This terminology laid the foundation for cell theory, which states that the cell is the basic unit of life. The other contributions mentioned, while significant in their own right, do not pertain to Hooke. The discovery of the nucleus is attributed to other scientists who studied plant and animal cells later. The theory of evolution was primarily developed by Charles Darwin and Alfred Russel Wallace in the 19th century. The invention of the microscope cannot be credited to a single individual but rather evolved through contributions from various inventors, although Hooke did enhance its use in biology. Thus, Hooke's naming of the "cell" represents a pivotal moment in the history of biology.
Question 4
Which gas law relates pressure, volume, and temperature of a gas?
Correct Answer:
Ideal gas law (PV=nRT)
Explanation:
The relationship between pressure, volume, and temperature of a gas is best described by the ideal gas law, represented as \(PV = nRT\), where \(P\) is pressure, \(V\) is volume, \(n\) is the number of moles of the gas, \(R\) is the ideal gas constant, and \(T\) is the temperature in Kelvin. This law encompasses the principles of other gas laws, such as Boyle's Law, which states that pressure and volume are inversely related at a constant temperature, and Charles's Law, which states that volume is directly proportional to temperature at constant pressure. The ideal gas law allows for a comprehensive understanding of the gas's behavior under varying conditions of pressure, volume, temperature, and amount of substance, integrating these key variables into a single equation. It provides a more complete picture than the other laws, which address only specific aspects of the gas's behavior. Avogadro's Law specifically relates the volume of a gas to its amount (number of moles) at constant temperature and pressure but does not encompass how temperature and pressure influence volume on their own, nor does it connect all three parameters in a unified framework like the ideal gas law does.
Question 5
What is the main difference between saturated and unsaturated fatty acids?
Correct Answer:
Unsaturated fatty acids contain double bonds
Explanation:
The distinction between saturated and unsaturated fatty acids primarily revolves around the presence of double bonds in their carbon chains. Unsaturated fatty acids are characterized by having one or more double bonds between the carbon atoms. These double bonds introduce kinks in the fatty acid chain, preventing the molecules from packing closely together, which impacts their physical state at room temperature — unsaturated fatty acids are typically liquid (like oils), while saturated fatty acids, lacking double bonds, have straight chains that allow them to pack tightly, leading to a solid state (like butter). Furthermore, this structural difference plays a crucial role in their functions in biological systems, influencing membrane fluidity and metabolic pathways. The presence of double bonds in unsaturated fatty acids contributes to the fluidity of cellular membranes, which is vital for proper cell function. In contrast, the straight chains of saturated fatty acids can lead to a more rigid structure in lipids. Therefore, understanding this key structural difference — that unsaturated fatty acids contain double bonds — is essential for grasping the biochemical properties and implications of these fatty acids in biological systems.
Question 1
Exam overview

About this Exam

The Chemical and Physical Foundations of Biological Systems (C/P) Full-Length (FL) 2 Practice Test is a crucial diagnostic tool designed by the Association of American Medical Colleges (AAMC). This official practice exam is specifically created for pre-medical students preparing for the Medical College Admission Test (MCAT). It provides an invaluable opportunity to experience the exact format, pacing, and difficulty level of the actual C/P section of the MCAT, ensuring you are fully prepared for test day.

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Additional Information

What the Course Entails and Exam Details

This practice exam covers the foundational concepts necessary for success in medical school, integrating principles from several scientific disciplines. While not a conventional course, preparing for this exam requires a deep understanding of the official MCAT C/P syllabus.

Core topics you must master include:

  • General Chemistry: Atomic structure, chemical bonding, stoichiometry, kinetics, equilibrium, thermodynamics, and electrochemistry.

  • Organic Chemistry: Structure, nomenclature, stereochemistry, and reactivity of major functional groups (e.g., alcohols, carbonyls, carboxylic acids, and amines).

  • Physics: Mechanics (kinetics, work, energy, power), fluid dynamics, waves, sound, electricity and magnetism, and optics.

  • Biology: Fundamental concepts of biochemistry and cellular biology as they relate to chemical and physical principles (e.g., enzyme kinetics, metabolism).

This FL 2 exam is a representative example of what you will face, testing your ability to reason through complex scientific scenarios.


What to Expect in the Final Exam

On your scheduled MCAT test day, the official C/P section will adhere to the following strict format:

  • Format: 59 multiple-choice questions in total. These questions are organized into 10 passage-based sets (containing 4-6 questions each) and 15 independent, standalone questions.

  • Time Limit: You will have exactly 95 minutes to complete this section.

  • Scoring: There is no negative marking for incorrect answers. Your raw score is converted to a scaled score ranging from 118 to 132. There is no official "passing score," as requirements vary by medical school.

  • Specific Rules: A basic periodic table is available on-screen throughout this section. Standard testing protocols apply, including strict rules regarding electronic devices and prohibited materials.


How to Study and Exam Centers

Success on the C/P section demands targeted preparation.

  • Actionable Study Strategies:

    • Review Official AAMC Materials: Prioritize understanding the explanations provided by the AAMC for every question in the FL 2 practice test, especially the ones you missed.

    • Simulate Test Conditions: Take the FL 2 practice exam in a quiet, undisturbed environment, strictly adhering to the 95-minute time limit to build endurance.

    • Master High-Yield Concepts: Focus extra effort on core areas like acid-base chemistry, thermodynamics, and the fundamental principles of physics.

    • Practice Passage Analysis: Develop a systematic approach to reading complex scientific passages and identifying the key information needed to answer the associated questions.

  • Exam Centers: The official MCAT is administered year-round by appointment at designated Pearson VUE testing centers throughout the United States, Canada, and select international locations. You cannot take the actual MCAT online from home. The FL 2 practice exam itself is purchased and taken digitally via the AAMC’s online portal.


Job Opportunities from the Course

Mastery of the AAMC Chemical and Physical Foundations of Biological Systems material is a fundamental requirement for all students aspiring to careers in the medical and healthcare fields. Scoring competitively on this section of the MCAT unlocks the door to:

  • Medical Doctor (MD)

  • Doctor of Osteopathic Medicine (DO)

  • Physician Assistant (PA)

  • Anesthesiologist

  • Biomedical Researcher

  • Cardiologist

  • General Surgeon

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