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Many DAT and OAT students memorize pKa values but struggle to apply them to equilibrium problems. Post your reasoning below, and Dr. Romano will let you know if you're right. Get started with our free DAT and OAT study resources: Start Your DAT and OAT Preparation for Free | Official...

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 biggest mistakes students make is trying to memorize every metabolic pathway. Dr. Romano teaches students to understand the concepts behind the reactions instead. Question: In glycolysis, the conversion of 2-phosphoglycerate to phosphoenolpyruvate is classified as what type of...

Think you know the answer? Work through the problem in the slides, then check the explanation. Want to master Degree of Unsaturation (DBE) and solve these questions with confidence? ▶ YouTube: DAT Destroyer by Dr. Jim Romano 📚 DAT Destroyer: DAT Destroyer 2026 — Complete DAT Science Prep...

Understanding the difference between combinations and permutations is essential for success on the DAT Quantitative Reasoning section. In this video, Professor Blois explains how to determine when order matters, when it does not, and how to avoid common probability mistakes students make on...

A positive cell potential indicates a spontaneous galvanic cell reaction. Consider the following cell: Pb / Pb(NO₃)₂ (1.0 M) || AgNO₃ (1.0 M) / Ag As this cell operates, which reaction occurs at the negative electrode? ✅ Correct Answer: B Pb → Pb²⁺ + 2e⁻ Key concepts tested: •...

A student was asked the following DAT Quantitative Reasoning challenge. Can you solve it before looking at the answer on slide 2? Post your answer and explanation below. Free DAT Resources: Start Your DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano Facebook...

Colligative Properties can be challenging because many students try to memorize equations without first understanding the concepts. In this General Chemistry lesson, Dr. Romano reviews the principles behind freezing point depression, boiling point elevation, vapor pressure lowering, and...

Can you identify the correct answer before viewing the solution? Understanding resonance structures and electron delocalization is essential for success in General Chemistry and frequently tested on both the DAT and OAT. If you're preparing for the DAT or OAT, the DAT Destroyer and Math...

Can you answer this DAT General Chemistry question before going to Slide 2? Quantum numbers are a frequently tested topic on the DAT and OAT. Understanding how electron configurations relate to the four quantum numbers can help you answer these questions quickly and accurately on test day...

Where are the Crypts of Lieberkühn primarily located? A. Stomach B. Esophagus C. Small Intestine D. Liver E. Large Intestine F. Pancreas The Crypts of Lieberkühn are important glandular structures found within the lining of the small intestine and play a role in secretion and epithelial cell...

I studied almost exclusively with OATbooster while also consulting YouTube and a few more free sites if I needed more clarification on specific concepts. Majority of my learning came from doing practice tests. While studying I was also working a full time job (9am-6pm M-F) so I spent less time...

Dr. Jim Romano’s Summer DAT and OAT Classes are now open. • In-person in Staten Island, NY or live online via Zoom • 25 sessions • Small class environment with personal attention • Dr. Romano teaches 100% of every in-person session • Trusted by students since 2006 Free Q&A every Tuesday at 8...

Combinations and permutations are a fundamental part of DAT Quantitative Reasoning, and understanding when to use each can make a significant difference on test day. The key distinction is straightforward: • Use permutations when order matters • Use combinations when order does not matter...

Most DAT students underestimate what it takes to improve their score — and it costs easy points on test day. In this video, Dr. Jim Romano breaks down how to actually prepare for the DAT and what students should focus on to improve their performance. Students often ask which DAT study...

Dr. Romano put together a free Organic Chemistry cheat sheet covering the most tested reactions on the DAT & OAT. ✅ Grignard Reactions ✅ Diels-Alder ✅ Markovnikov / Anti-Markovnikov ✅ Aromatic Reactions Free download here: Free Orgo Cheat Sheet for DAT | DAT Destroyer by Orgoman Students...

Understanding the difference between E2 and SN2 reactions is one of the most commonly tested and most confusing topics on the DAT. In this video, Dr. Jim Romano explains how to quickly determine whether a reaction will proceed through an E2 or SN2 mechanism, and the key factors that control...

Core Foundation in Dr. Romano’s DAT Courses Students often ask which DAT study materials are used in Dr. Romano’s DAT preparation classes. Two books sit at the core of Dr. Romano’s course curriculum, both online and in person: the DAT Destroyer and the Math Destroyer. DAT Destroyer Math...

One of the most common mistakes on DAT investment problems is confusing total value with total profit. Total investment = 50,000 Total accumulated value = 54,300 Actual profit = 4,300 The equation must reflect profit: 0.14x + 0.02(50,000 − x) = 4,300 Once the setup is correct, the...

Colligative properties are a classic high-yield topic on the DAT General Chemistry section. Understanding how particle number affects boiling point elevation, freezing point depression, and osmotic pressure is essential for solving many exam questions efficiently. In this video, Dr. Jim Romano...

Here is a representative Quantitative Reasoning problem involving prime factorization — a concept that appears frequently on the DAT in disguised form. Problem 224 = (2^a)(7^b) What is a / b ? A) 7 B) 5 C) 7/5 D) 5/5 E) 1/7 Try solving it before looking at the explanation. Solution...

Discount word problems are a common source of lost points on the DAT Quantitative Reasoning section. In this video, Prof. Denis Blois walks through a representative discount problem step-by-step, showing how to correctly interpret percentages, compare original and sale prices, and avoid the...

Sharing a short General Chemistry video for DAT and OAT students. In this lesson, Dr. Jim Romano explains how density problems are tested on the DAT and walks through the setup step by step. These questions are very common, especially for students early in their preparation, and mistakes...

Thank you to the students who have trusted DAT Destroyer over the years. We will continue posting FREE high-yield DAT Biology, General Chemistry, and Organic Chemistry videos to help students prepare the right way. Official Channel: DAT Destroyer by Dr. Jim Romano For free daily help, join...

As a thank-you to the SDN community, SDN members can use the discount code SDNTake10 for 10% off any single Destroyer book (DAT or OAT). Please note: • The discount applies to individual books only • Bundles are already discounted automatically at checkout, so no additional code is needed for...

General chemistry pH calculations are a high-yield topic on the DAT and OAT, and many students lose points by overthinking the setup. In this short video, Dr. Jim Romano walks through a clear, exam-focused approach to pH calculations so you can recognize the correct method quickly and avoid...

Mr. Rostov invested a sum of money into an index fund that pays 9% interest per year. After 30 years, his gain was $1,326,767.85. Prior to the investment, Mr. Rostov was saving $50 per day from his salary. How long did he have to save to invest the needed amount to obtain those gains? A) 2.5...

Question: How many distinct C-13 NMR signals does C₆₀ (buckminsterfullerene) produce? Answer: Even though C₆₀ contains 60 carbon atoms, it produces only 1 C-13 NMR signal. This is because the molecule is extraordinarily symmetrical — every carbon atom occupies an identical environment. In NMR...

At what vertebrae level does the spinal cord end? a) T1–T2 b) Sacrum c) L1–L2 d) T12–L1 e) Coccyx Correct Answer: C (L1–L2) In adults, the spinal cord ends in the lumbar region at the level of the first and second lumbar vertebrae (L1–L2). This cone-shaped ending is called the conus...

SN1 vs SN2 is one of the most tested reaction mechanisms on both the DAT and OAT, and many students still struggle to decide which pathway a substitution reaction will follow. Dr. Romano breaks down the key concepts step-by-step in this short teaching video. What this video covers: • The...

Black Friday Giveaway Winner Announcement | DAT Destroyer | OAT Destroyer Congratulations to our Black Friday Giveaway Winner, @seohyunmiin. You have won a brand-new DAT Destroyer book from Dr. Jim Romano and Orgoman. Please contact us within 7 days so we can confirm your shipping...

Sheldon has 60 fewer apps on his phone than Patricia.Patricia has 5× as many apps as Sheldon.If their total number of apps were divided evenly among three friends, how many apps would each friend receive? A) 12 B) 15 C) 30 D) 20 E) 10 Answer: C Let S = Sheldon and P = Patricia S = P – 60...

If you're feeling stuck with self-study or overwhelmed by the amount of material, our live Zoom-based DAT & OAT classes might be the structure you need this fall. The course is taught by Dr. Jim Romano, creator of the DAT & OAT Destroyer books, and Professor Barengolts, a former NYU Chemistry...

Hi all! I just took the OAT two days ago, and I wanted to share my experience and thoughts like others that I have learned from. Background: I began studying for the OAT with Booster Prep in January for my exam in March full-time. Initially, I followed the 8 week study schedule for content...

I took the OAT on January 4 to apply for the 2023-2024 cycle. I really dedicated my time and energy to studying consistently in order to score well so that I can hopefully get in to a school despite me applying a bit late in the application cycle. I sent my applications to schools in mid...

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Hello, I received my score on 8/18. I scored a 400 in every category: (400/400/400/400/400/400). I have been helping many people decide how to study in a short time frame (<6 weeks) and I would love to help anyone here. However, I am a tutor for both types of chemistry, and thus my studying...

Hello! I took my OAT last week and was pleasantly surprised with my scores. I wanted to share how I studied, my scores, and what resources I used. My scores the first score is what my average practice score was and the second is my actual OAT score. Quantitative Reasoning: 270 -> 350 Reading...

Hey guys I am a current OPT1 who just finished their first round of midterms. I wanted to make a post on here now that school has slowed down a bit. I used SDN a lot when I was preparing for the OAT/applying to schools. I used Chad’s videos a lot at first, which were helpful for understanding...

I had made a previous post about an upcoming OAT and here's how I did: QR 390 RC 350 Bio 340 GenChem 340 OChem 340 Physics 350 TS 350 AA 350 I'm pretty happy with the scores - i've never had more anxiety from an exam and i'm relieved it's over. I'm applying this upcoming cycle and would...