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MCAT® (Medical College Admission Test®)
Association of American Medical Colleges
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What are the official AAMC MCAT dates for 2024 and how do I register?
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How can I effectively use the AAMC MCAT practice tests to prepare for the exam?
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What are the requirements and eligibility criteria to register for the MCAT in 2024?
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What are the best MCAT prep books and courses recommended for the 2024 exam?
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How do I prepare for the MCAT if I only have one month left to study?
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What are the best strategies and Anki decks for studying amino acids for the MCAT?
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Chemical and Physical Foundations of Biological Systems
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How do I check my MCAT scores and understand the scoring system?
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What are the advantages and disadvantages of using Blueprint MCAT prep resources?
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Can high school students take the MCAT, and what are the prerequisites for taking the exam?
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What are the most challenging sections of the MCAT, and how can I improve my score in these areas?
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Critical Analysis and Reasoning Skills
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What topics are covered in the MCAT, and what is the importance of subjects like physics and organic chemistry?
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Physics
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How does the MCAT compare to other exams like the GRE, LSAT, and DAT in terms of difficulty and format?
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What is the validity period for MCAT scores, and how do they impact medical school admissions?
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What are the best online resources and free practice tests available for MCAT preparation?
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What are the key topics and high-yield areas to focus on for the MCAT biology and biochemistry sections?
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Biological and Biochemical Foundations of Living Systems
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How do I create an effective study schedule for the MCAT, and what daily practices can help maximize my score?
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What are the latest changes in the MCAT exam format and content for the 2024 cycle?
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How can international students register for the MCAT, and what are the testing locations available worldwide?
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What is the difference between the MCAT and MDCAT, and which one is required for medical school admissions in different countries?
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How do I prepare for the CARS section of the MCAT, and what are the best practice tools and strategies?
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Critical Analysis and Reasoning Skills
Mushkovic
BIOLOGY
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Biological and Biochemical Foundations of Living Systems
Which of the following best describes the role of an enzyme in a biochemical reaction?
A. Enzymes increase the free energy of the reactants..
B. Enzymes decrease the activation energy of the reaction..
C. Enzymes are consumed in the reaction..
D. Enzymes shift the equilibrium position of the reaction..
Mushkovic
BIOLOGY
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Biological and Biochemical Foundations of Living Systems
During glycolysis, which molecule is directly converted into pyruvate?
A. Glucose.
B. Fructose-1,6-bisphosphate.
C. Glyceraldehyde-3-phosphate.
D. Acetyl-CoA.
Mushkovic
BIOLOGY
-
Biological and Biochemical Foundations of Living Systems
Which of the following statements about the fluid mosaic model of cell membranes is correct?
A. Phospholipids form a rigid bilayer..
B. Proteins are embedded within and can move laterally through the lipid bilayer..
C. Carbohydrates are only found on the intracellular side of the membrane..
D. Cholesterol is absent in eukaryotic cell membranes..
Mushkovic
BIOLOGY
-
Biological and Biochemical Foundations of Living Systems
In the central dogma of molecular biology, which process involves the synthesis of RNA from a DNA template?
A. Replication.
B. Transcription.
C. Translation.
D. Reverse transcription.
Mushkovic
BIOLOGY
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Biological and Biochemical Foundations of Living Systems
Which organelle is primarily responsible for the production of ATP through oxidative phosphorylation?
A. Nucleus.
B. Endoplasmic reticulum.
C. Mitochondrion.
D. Lysosome.
Mushkovic
BIOLOGY
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Biological and Biochemical Foundations of Living Systems
What is the role of the enzyme DNA ligase in DNA replication?
A. Unwinding the DNA double helix.
B. Adding nucleotides to the growing DNA strand.
C. Sealing nicks and joining Okazaki fragments on the lagging strand.
D. Synthesizing RNA primers.
Mushkovic
BIOLOGY
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Biological and Biochemical Foundations of Living Systems
Which of the following is a correct statement about the function of ribosomes?
A. Ribosomes are involved in the transcription of DNA to mRNA..
B. Ribosomes are the site of lipid synthesis..
C. Ribosomes facilitate the translation of mRNA into proteins..
D. Ribosomes modify and package proteins for secretion..
Mushkovic
BIOLOGY
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Biological and Biochemical Foundations of Living Systems
What is the primary function of the sodium-potassium pump in animal cells?
A. Generating ATP.
B. Maintaining the resting membrane potential.
C. Facilitating the passive diffusion of sodium and potassium ions.
D. Transporting glucose into cells.
Mushkovic
BIOLOGY
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Biological and Biochemical Foundations of Living Systems
Which metabolic pathway directly produces NADPH and ribose-5-phosphate?
A. Glycolysis.
B. Citric Acid Cycle.
C. Pentose Phosphate Pathway.
D. Beta-oxidation.
Mushkovic
BIOLOGY
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Biological and Biochemical Foundations of Living Systems
In a hypothetical organism, a mutation in the gene encoding for histone H1 results in defective chromatin structure. Which cellular process would most likely be affected?
A. Protein synthesis.
B. DNA replication.
C. Glycolysis.
D. RNA splicing.
Mushkovic
BIOLOGY
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Chemical and Physical Foundations of Biological Systems
What is the primary function of myoglobin in muscle cells?
A. Transport oxygen from the lungs to tissues.
B. Store oxygen for use during periods of high metabolic demand.
C. Facilitate the breakdown of glucose.
D. Catalyze the conversion of ADP to ATP.
Mushkovic
BIOLOGY
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Chemical and Physical Foundations of Biological Systems
Which of the following describes the type of bonding and interaction within a DNA double helix?
A. Ionic bonds between phosphate groups.
B. Hydrogen bonds between complementary nitrogenous bases.
C. Covalent bonds between ribose sugars.
D. Van der Waals interactions between nitrogenous bases.
Mushkovic
BIOLOGY
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Chemical and Physical Foundations of Biological Systems
Which principle explains the increase in pressure observed in a closed system when temperature is increased, assuming volume remains constant?
A. Boyle's Law.
B. Charles's Law.
C. Dalton's Law.
D. Gay-Lussac's Law.
Mushkovic
BIOLOGY
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Chemical and Physical Foundations of Biological Systems
During oxidative phosphorylation, the energy for ATP synthesis is directly provided by:
A. The flow of electrons along the electron transport chain.
B. The reduction of NAD+ to NADH.
C. The establishment of a proton gradient across the inner mitochondrial membrane.
D. The splitting of water molecules.
Mushkovic
BIOLOGY
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Chemical and Physical Foundations of Biological Systems
What is the main role of the enzyme carbonic anhydrase in red blood cells?
A. Transporting oxygen.
B. Catalyzing the conversion of carbon dioxide to bicarbonate.
C. Facilitating the absorption of glucose.
D. Synthesizing hemoglobin.
Mushkovic
BIOLOGY
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Chemical and Physical Foundations of Biological Systems
Which of the following is true regarding the relationship between Gibbs free energy (ΔG) and the spontaneity of a chemical reaction?
A. A reaction with ΔG > 0 is spontaneous..
B. A reaction with ΔG = 0 is at equilibrium..
C. A reaction with ΔG < 0 is non-spontaneous..
D. A reaction with ΔG = 0 has no change in entropy..
Mushkovic
BIOLOGY
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Chemical and Physical Foundations of Biological Systems
In an electrolytic cell, which of the following occurs at the cathode?
A. Oxidation.
B. Reduction.
C. Electron flow into the anode.
D. Positive ions migrate away from the cathode.
Mushkovic
BIOLOGY
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Chemical and Physical Foundations of Biological Systems
What type of intermolecular force is primarily responsible for the high boiling point of water?
A. London dispersion forces.
B. Dipole-dipole interactions.
C. Hydrogen bonding.
D. Ionic bonding.
Mushkovic
BIOLOGY
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Chemical and Physical Foundations of Biological Systems
In the context of enzyme kinetics, what does a low Km value indicate about an enzyme's affinity for its substrate?
A. Low affinity.
B. High affinity.
C. No affinity.
D. It depends on the enzyme's Vmax.
Mushkovic
BIOLOGY
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Chemical and Physical Foundations of Biological Systems
Which of the following statements about the photoelectric effect is correct?
A. The kinetic energy of emitted electrons increases with increasing light intensity..
B. No electrons are emitted below a certain threshold frequency, regardless of light intensity..
C. Electrons are emitted even at zero frequency if the light intensity is high enough..
D. The number of emitted electrons decreases with increasing light frequency..
Contributor(2)
Shah Jahan
Mushkovic