dr. jim romano

Can you solve this high-yield Organic Chemistry problem? A D₂O (deuterium oxide) shake is a classic proton (¹H) NMR technique used to identify exchangeable protons. Which of the following compounds will not give a positive D₂O shake test? Test yourself before revealing the answer, then...

Can you solve this high-yield Organic Chemistry problem? A D₂O (deuterium oxide) shake is a classic proton (¹H) NMR technique used to identify exchangeable protons. Which of the following compounds will not give a positive D₂O shake test? Test yourself before revealing the answer, then...

Congratulations to one of our students on earning a 500 Academic Average (AA), including an outstanding 600 in General Chemistry! — "Michael" (Name changed for privacy) Congratulations on an outstanding achievement, and thank you for allowing us to share your success. We wish you continued...

A big thank you to our incredible 2026 Summer DAT/OAT class! We're grateful to be working with such a dedicated group of future dentists and optometrists. Their hard work, perseverance, and commitment continue to inspire us, and we look forward to celebrating their future dental and optometry...

Congratulations to our incredible 2026 Summer DAT & OAT Preparation Course students! We're proud of everything this class accomplished through hard work, dedication, and perseverance. It has been an honor helping future dentists and optometrists prepare for one of the most important exams of...

The reticuloendothelial system (mononuclear phagocyte system) is a high-yield Biology topic tested on both the DAT and OAT. In this lesson, Dr. Jim Romano explains the role of macrophages, phagocytosis, and immune system function, while highlighting the concepts students commonly miss on exam...

The reticuloendothelial system (mononuclear phagocyte system) is a high-yield Biology topic tested on both the DAT and OAT. In this lesson, Dr. Jim Romano explains the role of macrophages, phagocytosis, and immune system function, while highlighting the concepts students commonly miss on exam...

Can you identify the metal catalyst used in the Heck cross-coupling reaction? The Heck reaction is one of the highest-yield reactions tested on the DAT and OAT. Before looking at the second slide, see if you can identify the catalyst required for this important carbon-carbon bond-forming...

Can you identify the metal catalyst used in the Heck cross-coupling reaction? The Heck reaction is one of the highest-yield reactions tested on the DAT and OAT. Before looking at the second slide, see if you can identify the catalyst required for this important carbon-carbon bond-forming...

Preparing for the OAT Physics section? We've organized our OAT Physics Practice Questions and Video Solutions into one convenient playlist. Whether you're just beginning your review or reinforcing challenging concepts, these high-yield videos cover many of the topics tested on the OAT and...

Here is today's DAT/OAT Quantitative Reasoning challenge. An analog clock has 12 hour markings. Based on the time intervals shown, how many total hour markings does the minute hand pass? Consistent practice with challenging problems is one of the best ways to improve your Math score and...

Here is today's DAT/OAT Quantitative Reasoning challenge. An analog clock has 12 hour markings. Based on the time intervals shown, how many total hour markings does the minute hand pass? Consistent practice with challenging problems is one of the best ways to improve your Math score and...

Preparing for the OAT? This Organic Chemistry lesson reviews two important high-yield topics: aromatic chemistry and the Wittig reaction. Understanding these reactions and how they are used in multistep synthesis problems is essential for success on the OAT. Dr. Jim Romano explains the...

Preparing for the DAT or OAT? This Organic Chemistry lesson reviews two important high-yield topics tested on both exams: aromatic chemistry and the Wittig reaction. Understanding how these reactions fit into multistep synthesis problems is essential for success on the DAT and OAT. In this...

Choosing the right dental school is one of the most important decisions you'll make as a pre-dental student. We've created a free guide that brings together admissions information for dental schools across the United States and Canada, making it easier to compare programs as you prepare your...

n you determine the equation of the green graph? This problem tests your understanding of absolute value graph transformations, including reflection across the x-axis, horizontal shifts, vertical shifts, and identifying the vertex. Try solving it before checking the solution. Free DAT and...

Understanding graph transformations is essential for success on the DAT and OAT Quantitative Reasoning section. In this Math Destroyer problem, you'll identify the equation of an absolute value function by analyzing: Reflection across the x-axis Horizontal translation Vertical translation...

Applying to optometry school in 2026? We've put together a free resource to help you compare optometry schools, review admissions requirements, and learn more about the OAT and the application process. Whether you're just starting your research or getting ready to apply, this guide is a...

Many DAT and OAT students confuse simple interest with compound interest, especially under timed exam conditions. In this lesson, Dr. Jim Romano explains the key differences, the formulas you need to know, and how to solve these problems efficiently on test day. 📹 Video: Free DAT & OAT...

Understanding the difference between simple interest and compound interest is an important skill for the DAT and OAT Quantitative Reasoning section. In this video, Dr. Jim Romano walks through the concepts step by step and shows how to recognize and solve these problems quickly on test day...

How well do you know the electron transport chain? Iron-sulfur (Fe-S) proteins are essential components of the electron transport chain and play a critical role in oxidative phosphorylation. This DAT/OAT Biology question tests your understanding of non-heme iron in iron-sulfur proteins...

How well do you know the electron transport chain? Iron-sulfur (Fe-S) proteins are essential components of the electron transport chain and play a critical role in oxidative phosphorylation. This DAT/OAT Biology question tests your understanding of non-heme iron in iron-sulfur proteins...

Can you identify the false statement before looking at the explanation? This DAT/OAT Organic Chemistry synthesis problem reviews several high-yield topics that students should master: Swern oxidation Wittig reaction Epoxidation with mCPBA Spiro vs. bicyclic compounds Organolithium epoxide ring...

Can you identify the false statement before looking at the explanation? This DAT/OAT Organic Chemistry synthesis problem reviews several high-yield topics that students should master: Swern oxidation Wittig reaction Epoxidation with mCPBA Spiro vs. bicyclic compounds Organolithium epoxide...

Preparing for the OAT? Can you identify a disproportionation reaction? In a disproportionation reaction, one molecule is both oxidized and reduced in the same reaction. A common mistake is thinking the acid workup is part of the reaction mechanism. It isn't. The reaction is already...

Preparing for the OAT? Stereochemistry is one of the highest-yield Organic Chemistry topics on the OAT. In this video, Dr. Jim Romano explains key stereochemistry concepts that students must understand to solve OAT Organic Chemistry problems with confidence. This lesson emphasizes...

DAT Organic Chemistry Stereochemistry Explained | DAT Destroyer | OAT Destroyer | Dr. Jim Romano Preparing for the DAT? Stereochemistry is one of the highest-yield Organic Chemistry topics on the DAT. In this video, Dr. Jim Romano explains key stereochemistry concepts that students must...

In a disproportionation reaction, one molecule is both oxidized and reduced in the same reaction. A common mistake is thinking the acid workup is part of the reaction mechanism. It isn't. The reaction is already complete before protonation. The acid simply converts the carboxylate salt into...

Can you rank these aromatic compounds from most reactive to least reactive toward electrophilic aromatic substitution (EAS)? I. Chlorobenzene II. Aniline III. Ethylbenzene IV. Benzoic acid This classic DAT Organic Chemistry problem tests your understanding of activating and deactivating...

Understanding Hückel's Rule is essential for success on the OAT Organic Chemistry section. While many students memorize the 4n + 2 rule, the key to answering challenging exam questions is knowing when and how to apply it. In this lesson, Dr. Jim Romano explains how to distinguish aromatic...

Understanding Hückel's Rule is essential for success on the DAT and OAT Organic Chemistry sections. While many students memorize the 4n + 2 rule, the key to answering challenging exam questions is knowing when and how to apply it. In this lesson, Dr. Jim Romano explains how to distinguish...

Solution Correct Answer: F — All are true. A) Catalytic hydrogenation proceeds by syn addition, so both hydrogens are delivered from the less hindered face, giving a product in which the two methyl groups are cis. B) The hydrogenation is highly stereoselective because hydrogen approaches...

Another outstanding DAT Destroyer student has achieved exceptional results! Organic Chemistry: 600 Total Science: 560 Academic Average: 520 We're incredibly proud of this student's hard work and dedication. Congratulations on an outstanding performance, and thank you for your thoughtful...

Can you solve this DAT Organic Chemistry question before revealing the answer? This problem tests an important DAT concept: alkoxymercuration-demercuration. The trick is recognizing what happens when CH₃OH (methanol) is used instead of water. Many students automatically think "alcohol," but...

Can you solve this DAT Quantitative Reasoning question before checking the answer? This problem tests your understanding of exponents, absolute value, and logical reasoning. A useful DAT strategy is to plug in numbers that satisfy the equation. For example: 82=648^2 = 6482=64 43=644^3 =...

Enrollment is now open for our Fall 2026 DAT and OAT Preparation Classes. For more than 35 years, Dr. Jim Romano has helped thousands of students prepare for the DAT and OAT through comprehensive study materials and live instruction. Our program features: Live online and in-person classes...

Can you solve this DAT Quantitative Reasoning problem? This practice problem tests your understanding of least common multiples (LCM) and number theory—concepts that frequently appear on the DAT. Recognizing that a number divisible by both 3 and 5 must be a multiple of 15 makes this problem...

Can you solve this DAT Quantitative Reasoning problem? A, B, C, and D are consecutive odd integers greater than 0, such that A < B < C < D. Which of the following must be true? This problem tests your understanding of number properties and logical reasoning—skills that are frequently tested...

Understanding the cytochrome P450 (P450) enzyme system is essential for success on the DAT and OAT Biology sections. In this lesson, Dr. Jim Romano explains how the liver detoxifies drugs, toxins, and other foreign compounds through the P450 enzyme system. Instead of memorizing isolated facts...

Recognizing the stages of mitosis is a fundamental Biology skill tested on the DAT and OAT. Rather than memorizing definitions, it's important to identify each phase by the appearance and position of the chromosomes under the microscope. Can you correctly identify the stages for Cells 1 and 2...