oat destroyer

Hess’s Law and thermochemistry are high-yield topics on the DAT General Chemistry section and come up frequently on the exam. In this short video, Dr. Jim Romano walks through Hess’s Law step by step and shows how to handle enthalpy changes without getting tripped up by common test-day...

1 gram of an element combines with 0.35 g of oxygen to form X₂O.What is the atomic mass of X? a) 45 b) 23 c) 52 d) 77 e) 100 Correct answer: b) 23 As emphasized in class, this question is not about memorization — it’s about units. You must start with grams and end with g/mol. If the...

DAT Question of the Day 25.0 g of K₂C₂O₄ is reacted with KMnO₄ according to the following chemical equation: 5 K₂C₂O₄ (aq) + 2 KMnO₄ (aq) + 8 H₂O → 10 CO₂ (g) + 2 Mn(OH)₂ (s) + 12 KOH (aq) Given: MW of K₂C₂O₄ = 166.2 g/mol MW of KMnO₄ = 158.04 g/mol Question: How many grams of KMnO₄...

Logarithms are a common source of lost points on the DAT Math section, especially when students rely on memorized rules instead of understanding how logarithms actually behave. In this video, Prof. Blois walks through DAT-style logarithm problems step-by-step, showing: How logarithms are...

Circles and spheres are high-yield geometry topics on the DAT math section and are often tested through word problems involving volume, area, and spatial reasoning. In this short video, Prof Blois walks through a classic DAT-style problem involving circles and spheres, showing how to set it up...

This video walks through a DAT-style Hardy–Weinberg equilibrium problem and shows how to approach population genetics questions efficiently on the DAT. Key points covered: How to identify when Hardy–Weinberg applies Calculating allele and genotype frequencies Common mistakes students make on...

In this video, Dr. Jim Romano explains the reticuloendothelial system and how it is tested on the DAT and OAT. The focus is on macrophages, phagocytosis, and immune system function—areas that commonly confuse students in DAT Biology. This explanation is useful for students using the DAT...

Hi everyone — wanted to share a quick video walkthrough on an important QR topic that many students struggle with: Comparison Word Problems This video breaks down how to approach DAT-style comparison problems step-by-step so you can avoid timing traps and avoid common mistakes. YouTube 📹...

#DAT Question of the Day.... Identify the structures indicated by the arrows. a) Secretory granules b) Ribosomes c) Lipid droplets d) Lysosomes e) Glycogen granules Correct answer: B — Ribosomes Ribosomes are essential cellular machines responsible for protein synthesis. They translate...

=AZZfLUs4A5iKS2TcRZcI0pt9zf5h14VTpiRGmZU8uyze12tZKB62tVVrdRaMacW-G3oMeV4iS_QFX4aOfuzxmjIlYTkVCFlEW_KdnbRvOeBuHbq9d2koeqIVdDGpRu-zz_H62YbHzlnwBcMN02tYR5iV&__tn__=*NK*F']#DAT Question of the DAY.... The below molecule I present shows significant promise in cancer studies for inhibiting cancer...

Blood flow and blood vessels are high-yield DAT Biology topics that show up repeatedly on the exam. In this short video, Dr. Jim Romano explains how blood moves through arteries, veins, and capillaries, and how vessel structure relates directly to function — exactly how this material is tested...

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...

Genetics and Punnett squares are high-yield topics on the DAT and OAT Biology sections. In this video, Dr. Jim Romano walks through inheritance patterns and Punnett square reasoning the way the exam expects you to understand them — focusing on conceptual clarity, not memorization shortcuts...

DAT Question of the Day Alcohol consumption affects multiple neurotransmitter systems. After several drinks, which of the following will be decreased? a) GABA b) Serotonin c) Glutamate d) Dopamine e) Endorphins f) None — all increase Correct Answer: C) Glutamate Alcohol increases...

Nuclear chemistry questions appear on the DAT and OAT General Chemistry sections, and many students lose points by misunderstanding radioactive decay, nuclear equations, and setup. In this short video, Dr. Jim Romano walks through nuclear chemistry step by step, showing how to approach these...

Which of the following proteins is devoid of a quaternary structure? A) Myoglobin B) Keratin C) Hemoglobin D) Immunoglobin E) Collagen F) Two of these G) None of these (See answer below.) Correct Answer: A) Myoglobin Explanation: Myoglobin does not have a quaternary structure because it...

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...

Paul has been studying for his exams. For every 3 hours he spends studying Biology, he spends 2 hours studying Chemistry. He did not go to class and spent the entire day in the library. He only got 4 hours of sleep. The next day, he planned to spend the same total amount of time studying...

This short video breaks down a DAT Gas Law challenge problem that looks easy on the surface but catches many students off guard on test day. Dr. Jim Romano walks through the setup, strategy, and common mistakes students make with gas law questions under time pressure. Watch here: Gas law...

Let us consider the molecule shown above. After OH⁻ attacks in step 1, how many additional mechanism arrows are required to justify the formation of the product? a) 2 b) 3 c) 4 d) 5 e) 6 f) 7 g) 8 Answer: B Dr. Romano noted that this transformation is another classic “arrow problem,”...

Organic Chemistry Mechanism Arrows Explained (Video) | DAT Destroyer | OAT Destroyer Over the years I’ve seen a lot of students struggle with mechanism arrows in Organic Chemistry. It’s one of those areas where once you understand why electrons move, everything else starts to make sense —...

We are running a free 2025 Math Destroyer Giveaway for a limited time. ⚡ 48-Hour Flash Giveaway — 2025 Math Destroyer We are running a free 2025 Math Destroyer Giveaway for a limited time. This giveaway is hosted on our official Reddit community so students can enter and see transparent, public...

We are pleased to announce the winner of our recent DAT Destroyer Giveaway. Congratulations to our Instagram winner, @seohyunmiin. Thank you to everyone who participated and continues to support our mission of helping students succeed on the DAT. We will be offering more student giveaways...

. The sum of Ted’s 4 test scores is 340. How much higher must he score on the final exam, compared to the average of the first four exams, if the final exam is worth one third of the final grade for his average to become 87? A) 10 B) 7 C) 9 D) 6 E) 4 Answer: D If the sum of the four test...

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...

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...

Here is a high-yield DAT Math (QR) probability question — a topic many students struggle with on test day. This walkthrough is taught by Prof. Blois and is representative of the style and reasoning you will face on the actual exam. 📌 Watch the video: Probability questions are extremely...

DAT and OAT Math Practice Question (From Our Math Instructor) Max and Dave received a combined test score of 140. Max’s score was Z times higher than Dave’s. How much did Dave score in terms of Z? A) 140/(Z+1) B) 140/(Z−1) C) Z/(140+1) D) 1/(140+Z) E) Z/(1−140) Solution Let: M = Max’s...

DAT Question of the Day Which of the following does not describe a globular protein? a. generally function in structure and support roles b. hemoglobin is an example c. often function as enzymes or transport proteins d. peptide chains folded into spherical shapes e. water soluble Correct...

Percent yield shows up frequently on the DAT and OAT, and Dr. Romano breaks it down in a clear, high-yield way you can use on test day. If you’re prepping for the DAT or OAT, this is a must-know General Chemistry topic. 🎥 Watch the video: JOIN THE DAT DESTROYER COMMUNITY 👉 Facebook Study...

🎥 Biology video from Dr. Jim Romano: In this lesson, Dr. Romano explains the difference between decomposers and detritivores — two essential ecological groups that recycle nutrients and maintain balance in ecosystems. This is a high-yield topic that often appears on the DAT and OAT Biology...

I just took the OAT and I’m pretty happy with my scores. I’ll do my best to share my OAT experience. I was initially going to take the OAT earlier this year but had to postpone it because of a busy school schedule. I’m not a genius (3.42 GPA as a Bio major) but I do like to think I work very...

How is the physics section? Is it optics heavy? Do we really need to know all of the equations, or are the basic ones most important. I think chad's videos are very mcat oriented. Is all of that covered on the exam? Are destroyers a more accurate representation of the OAT? Sorry for all the...

Hey all! I am selling all of the material I used to do well on the OAT last summer. I have the following available: - Huge Kaplan Review Notes book- (light highlighting in first few bio chapters & some erased writing) - Kaplan Lesson Book- (minimal erased writing) - Kaplan Flashcards- (all...

I am selling all of the materials I used to study for the OAT. All of these things together helped me to get a competitive score and get into one of the top optometry schools! The following is for sale: Huge Kaplan Review Notes book- (light highlighting in first few bio chapters & some erased...

FOR SALE! OAT Big Blue Kaplan Review Notes Book 2016 (VERY helpful, covers all major topics in depth!!) OAT Destroyer (Organic Chemistry, General Chemistry, Quantitative Reasoning, Biology, Physics) which includes hundreds of practice questions with detailed solutions (VERY SIMILAR TO OAT) OAT...

I have seen a lot of old info circulating these 2 and was wondering if the Achiever on its own will be enough for practice problems? I've heard the Achiever was much harder than the Destroyer and that the Destroyer better prepares you for more realistic questions that would appear on the exam...