pre-dental

Congratulations to Avi Agh, the winner of our 2026 Labor Day Giveaway! Avi selected the 2026 DAT Destroyer, our complete DAT science preparation book covering Biology, General Chemistry, and Organic Chemistry. Thank you to everyone who participated. Dr. Romano and I truly appreciate your...

Congratulations to Avi Agh, the winner of our 2026 Labor Day Giveaway! Avi selected the 2026 DAT Destroyer, our complete DAT science preparation book covering Biology, General Chemistry, and Organic Chemistry. Thank you to everyone who participated. Dr. Romano and I truly appreciate your...

Test your Organic Chemistry skills with today’s question from Dr. Jim Romano. Study the first image, choose your answer, and then view the second image for Dr. Romano’s complete solution. Free official DAT and OAT study resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for...

Test your Organic Chemistry skills with today’s question from Dr. Jim Romano. Study the first image, choose your answer, and then view the second image for Dr. Romano’s complete solution. Free official DAT and OAT study resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for...

Hemoglobin carries oxygen from the lungs to tissues throughout the body. How well do you know the quaternary structure of normal adult human hemoglobin? Choose your answer before checking Dr. Romano’s explanation on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano...

Hemoglobin carries oxygen from the lungs to tissues throughout the body. How well do you know the quaternary structure of normal adult human hemoglobin? Choose your answer before checking Dr. Romano’s explanation on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano...

A wood factory wants to increase its monthly production by 50%. Can you determine how many additional logs must be produced each workday? Choose your answer before checking the solution on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT...

A wood factory wants to increase its monthly production by 50%. Can you determine how many additional logs must be produced each workday? Choose your answer before checking the solution on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT...

Mixture and concentration problems are important topics for the DAT and OAT Quantitative Reasoning sections. In this video, Dr. Jim Romano demonstrates how to calculate percentages and concentrations when two different mixtures are combined or diluted. Watch the complete lesson: Free DAT...

Mixture and concentration problems are important topics for the DAT and OAT Quantitative Reasoning sections. In this video, Dr. Jim Romano demonstrates how to calculate percentages and concentrations when two different mixtures are combined or diluted. Watch the complete lesson: Free DAT...

Which brain structure is most involved in pulling up and combining past memories to help create storylines? For more free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano Choose your answer before...

Which brain structure is most involved in pulling up and combining past memories to help create storylines? For more free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano Choose your answer...

I have worked with thousands of DAT and OAT students through the years, and one question I get asked over and over is: What study schedule should I follow? One of the biggest mistakes I see students make is trying to follow a study schedule created by someone else. No one else knows your...

I have worked with thousands of DAT and OAT students through the years, and one question I get asked over and over is: What study schedule should I follow? One of the biggest mistakes I see students make is trying to follow a study schedule created by someone else. No one else knows your...

Can you solve this one? Check the second image for Dr. Romano’s solution. Free DAT and OAT study resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano

DAT and OAT General Chemistry | DAT Destroyer | OAT Destroyer | Dr. Jim Romano Can you solve this one? Check the second image for Dr. Romano’s solution. Free DAT and OAT study resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano...

We’re celebrating with a 2026 OAT Destroyer Book Giveaway! If you know a pre-optometry student preparing for the OAT, please feel free to share this with them. One student will win a brand-new 2026 OAT Destroyer by Dr. Jim Romano, with shipping included to a U.S. or Canadian address. No...

Quick DAT/OAT Biology question from Dr. Jim Romano. Which gene encodes the repressor protein of the lac operon? Understanding gene regulation and the lac operon is important for DAT and OAT Biology. Make sure you understand why the answer is correct rather than simply memorizing it. Free...

Test your knowledge of the lac operon with this DAT/OAT Biology question from Dr. Jim Romano. Which gene encodes the repressor protein of the lac operon? Understanding how the lac operon regulates gene expression—including the roles of the regulatory gene, repressor, and operator—is an...

Congratulations to one of our Summer 2026 DAT students on an outstanding DAT performance! 🎉 Academic Average: 520 DAT Scores: General Chemistry: 550 Quantitative Reasoning: 530 Reading Comprehension: 530 Survey of Natural Sciences: 510 Organic Chemistry: 490 Biology: 480 Perceptual...

Post 🎉 Congratulations to our Summer 2026 DAT student on an outstanding DAT performance! We are excited to share this student's DAT success story: ⭐ Academic Average: 520 DAT Breakdown: • General Chemistry: 550 • Quantitative Reasoning: 530 • Reading Comprehension: 530 • Survey of...

Enzymes and inhibitors are among the highest-yield Biology topics on the DAT and OAT. In this video, Dr. Jim Romano explains the key concepts you need to understand, including how different inhibitors affect enzyme activity and how these questions are commonly tested. Free DAT & OAT Study...

Enzymes and inhibitors are among the highest-yield Biology topics on the DAT and OAT. In this video, Dr. Jim Romano explains the key concepts you need to understand, including how different inhibitors affect enzyme activity and how these questions are commonly tested. Free DAT & OAT Study...

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...

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...

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...

Decarboxylation is a fundamental organic chemistry reaction that frequently appears on the DAT and OAT. Understanding when carbon dioxide (CO₂) is eliminated and recognizing the reaction conditions can help you answer exam questions with confidence. In this lesson, Dr. Jim Romano explains the...

Dr. Jim Romano explains one of the most misunderstood topics in Organic Chemistry: how to correctly use curved arrows in reaction mechanisms. Many DAT and OAT students memorize reactions but lose points because they don't understand what the arrows actually represent. In this lesson, you'll...

How many times should you keep trying if you don't get the DAT score you need? This student's journey is proof that persistence pays off. After five DAT attempts, he committed to a better study strategy, worked hard with Dr. Jim Romano and the DAT Destroyer team, and eventually earned the...

Happy 4th of July to everyone in the SDN community! 🇺🇸 To celebrate, we're offering $25 off any individual Destroyer book — today only. Use code JULY4 at checkout: https://orgoman.com Applies to: DAT Destroyer OAT Destroyer Math Destroyer Gen Chem Destroyer Physics Destroyer Organic...

Many students confuse D/L notation with the direction of optical rotation. These are different concepts and should not be used interchangeably. Mastering amino acid stereochemistry is essential for success on the DAT and OAT. Understanding the underlying concepts—not just memorizing facts—will...

The Cytochrome P450 enzyme system is one of the most important biology concepts for students preparing for the DAT and OAT. It plays a critical role in the metabolism of many drugs and toxins in the liver. In this lesson, Dr. Jim Romano explains how the Cytochrome P450 system works and why...

Understanding the differences between arteries, veins, and capillaries is essential for success on the DAT and OAT Biology sections. In this video, Dr. Jim Romano explains: Arteries vs. veins Capillary structure and function Blood flow through the circulatory system High-yield DAT & OAT...

One of the most frequently tested DAT Biology topics is understanding the differences between DNA and RNA. Key points to remember: • DNA contains deoxyribose sugar, while RNA contains ribose sugar. • DNA is typically double-stranded; RNA is usually single-stranded. • DNA uses thymine (T)...

Can you solve this problem before going to Slide 2? Many students correctly calculate the restricted arrangements in this classic DAT permutation problem but miss what the question is actually asking. The key is to determine the difference between the unrestricted and restricted seating...

The Van der Waals equation of state for one mole of a real gas is as follows: (P + a/V²) (V - b) = RT The constant "a" provides a measure of the average attraction of the molecules, whereas constant "b" adjusts for the volume occupied by the gas particles. Which would you predict to have the...

One of the most rewarding parts of what we do is seeing students reach their goals and move one step closer to dental school. Dina recently earned: 450 Academic Average 470 Total Science 530 Organic Chemistry 430 Biology 450 General Chemistry 460 PAT 400 Reading Comprehension...

Sertoli cells are one of the highest-yield reproductive physiology topics tested on the DAT. Do you know which hormone these cells produce? Students often ask which DAT study materials are actually used in real courses. The DAT Destroyer and Math Destroyer are the core books used in Dr. Jim...