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Error Banks (OAT)
| Question | Answer |
|---|---|
| Which of the following would be present in both a virus and E. coli bacteria? | Nucleic Acids |
| An individual loses a significant amount of weight, going from 300 lbs to 150 lbs. In what form is the majority of this weight lost? | Exhalation in the form of CO2 |
| Which of the following best describes the interaction of estrogen with cells? | Estrogen diffuses through the membrane and binds to a receptor in the nucleus |
| An enzyme is added to a cell that destroys histone proteins. Which of the following would occur? | RNA polymerase will have better access to the chromatin |
| E. coli are bacteria found in the lower intestine of warm-blooded organisms. Under oxygen-deprived conditions, these organisms will carry out which of the following processes? | Glycolysis and Fermentation |
| Which of the following organelles would you expect to find in a prokaryotic cell? | Ribosome |
| Which of the following ions are stored in the sarcoplasmic reticulum of striated muscle cells? | Calcium ions |
| Which of the following structures lining the respiratory system is responsible for clearing debris and pathogens from the airway? | Cilia |
| Which of the following areas of the brain is incorrectly associated with its function? | Limbic System: motor and speech regulation. It actually regulates emotions, memory, motivation, and survival behaviors. |
| Which of the following occurs as a direct result of gastrulation? | Different parts of the embryo begin to interact with one another |
| Which of the following would trigger an intracellular response? | Increase in DAG |
| All of the following statements are true about enzymes EXCEPT one. Which one is the EXCEPTION? | Bind irreversibly to substrates |
| How many nucleotides are required to make 90 codons? | 270 |
| Which molecule has a very strong binding affinity for hemoglobin and is difficult to remove? | Carbon monoxide |
| What is the term for the junction between two neurons? | Synapse |
| What does GnRH directly stimulate the release of? | LH |
| What is most similar to an angiosperm seed? | Fertilized chicken egg |
| Each of the following is a condition that allows gases to behave ideally EXCEPT one. Which one is the EXCEPTION? | High pressure. They perform at high temperatures, low pressure |
| Each of the following are properties of transitional metals EXCEPT one. Which one is the EXCEPTION? | Have low melting points |
| Each of the following are single-replacement reactions that occur EXCEPT one. Which one is the EXCEPTION? | CaF2(s)+ Br2(ℓ) → CaBr2(s) + F2(g). Halogens that are higher up on the periodic table are more reactive. Based on this reactivity order, fluorine is more reactive than bromine, so the following reaction will not occur. |
| Which type of glassware sits below the burette in an acid-base titration? | Erlenmeyer flask |
| What is the pH of a 0.001 M solution of a monoprotic acid with a Ka value of 9 × 10^-7? | -log[3 × 10^-4]. To tackle this equation, we must first realize that the monoprotic acid given to us is NOT a strong acid (due to the low Ka value). Ka = (X)^2 / HA -> X = sqrt of (1*10^-3)(9*10^-7) |
| What are the colligative properties of liquid? | Colligative properties are properties that can only be applied to solutions and they depend on the amount or concentration of the solute in a solution. (Boiling point, Freezing point, Osmotic pressure, and Vapor pressure) |
| Which of the following best describes nuclear binding energy? | The energy required to disassemble the nucleus of an atom into its components |
| If you halve the pressure of a gas at constant temperature, what happens to the volume? | Volume will double. Use P1V1/n1T1 = P2V2/n2T2 |
| What is the value of E° for the following reaction? | Identify what's being reduced and what's being oxidized, if there's an oxidation, the sign should be neg and reduction should have a pos. Then add. |
| Under what conditions can a supercritical fluid be changed back into a liquid or gas? | Decrease temperature only (temp is the x axis and pressure is the y axis) |
| Benzene is reacted with one equivalent of Cl2 and FeCl3. What is the major product of the reaction? | This reaction can be classified as an electrophilic aromatic substitution reaction, specifically the chlorination of benzene. So, just Cl will be on the benzene. |
| When will things be deprotonated on a compound? | If the pka > pH, the weak acids will hold onto their hydrogen and exist in the protonated form. If pka < pH, the weak acids will donate hydrogen ions and exist in the deprotonated form. |
| What is the bromine test? | Br2/CCl4 is reagent, tests are alkenes and alkynes, dissapearance of brown color (bromine) signifies positive result |
| The rules for aromaticity are as follows: | The compound must be cyclic. The ring must be fully conjugated and planar (none of the atoms can be sp3 hybridized). The system must satisfy Huckel’s rule (# of pi electrons = 4n + 2, where n is any integer). |
| Antiaromatic | Cyclic, planar, fully conjugated, 4n π electrons |
| Non-aromatic | Fails one or more aromaticity requirements |
| How do ketones affect EAS reactions? | Ketones are electron-withdrawing groups due to the oxygen’s electronegativity. This electron withdrawal makes the aromatic ring less nucleophilic and less reactive in electrophilic aromatic substitution (EAS) reactions. |
| NBS | performs allylic bromination in the presence of heat or light. Allylic bromination is the replacement of a hydrogen atom on an allylic carbon (allylic = the carbon neighboring a C-C double bond) with a bromine atom. |
| An oxygen atom with two single bonds and two lone pairs is usually | sp3 hybridized (because it has 4 electron domains). But the oxygen atom can be sp2 hybridized because one of its lone pairs is delocalized (with 3 electron domains). If it's near another oxygen, it can switch the double bond to |
| How to tell which hydrogen is the most shielded? | The one near the triple bond (or highest bond, usually) |
| Which of the following is the correct unit of the vacuum permittivity ε0? | C^2 / N • m^2 |
| A ball is rolled off a horizontal table with a velocity, v. If the table has a height, h, and a mass m, which of the following describes the distance the ball will land from the table when it hits the ground? | v × √2h/g |
| A 60 kg skydiver reaches terminal velocity after 12 seconds of freefall. What is the net force on the skydiver once terminal velocity is reached? | 0 N. When the skydiver reaches terminal velocity, his speed becomes constant, therefore a = 0. Fnet = ma, 0 N. |
| The rays of light will move from a medium with a lower index of refraction (air) to a medium with a higher refraction index (water). Will the emerging rays diverge or converge? | Diverge |
| A helium balloon is let go in a room with a speed of 1.3 m/s upward, and it takes the balloon 3.0 seconds to reach the ceiling. If the room's draft has a speed of 0.4 m/s and is directed horizontally, what is the final horizontal displacement? | Use the d = v * t equation -> 0.4 * 0.3 = 1.2 m |
| An object is placed 1 m away from a convex lens that has a focal length of 0.8 m. Which of the following statements about the image is true? | The image will be formed behind the lens |
| A mass, attached to a spring, is oscillating in simple harmonic motion. Which of the following statements regarding this system is true? | Increasing the mass will increase the period of oscillation T = 2pi * sqrt (m/k) |
| Two tuning forks have frequencies of 400 Hz and 410 Hz and the same amplitude. How much time elapses between 2 successive beats? | Difference is 10 Hz. T = 1/fbeat = 1/10 = 0.1s. |
| Electric current can be expressed in which of the following units? | Coulombs/Seconds |
| A ball is kicked at an angle of 30 degrees above the ground. Which of the following statements is true? | The ball’s initial horizontal velocity is greater than its initial vertical velocity. You would do cos(30) vs. sin(30) |
| A toy train on a track goes around a vertical loop of radius 1m in 4s. What is its centripetal acceleration? | You would find the circumference of the loop 2pir over time to get v. Then just put that into the centrifugal force equation. |
| List the electromagnetic waves from the most energetic to the least energetic | Gamma rays – X-rays – Ultraviolet – Visible light – Infrared – Microwaves – Radio waves |
| A capacitor connected to a battery has two plates, each with a charge Q. If the capacitor is pulled apart such that the distance between the two plates is doubled, while still connected to the battery, what happens to the charge? | The charge is halved |
| The Grizzly Bear Express is heading north at 65 mph. The Penguin Express is heading the opposite direction at 45 mph. If they are 250 miles apart, how long will it take for them to meet (in minutes)? | 227. Add up the speed of the trains, do distance/speed to get time. Then convert the hours to minutes. |
| The average price of a fish dinner across 8 different restaurants is $16. If the price of fish nation-wide went up $2, what is the new average of fish plates? | $18.00 |
| A yacht usually travels 150 miles on a river in 10 hours. However, with the river's current, it takes only 8 hours. What is the speed in miles per hour of the river? | Determine the speed of the yacht alone and the yacht with the current. The yacht's speed with the current is the sum of the yacht's usual speed and the river's speed. |
| If you flip a fair coin 7 times, what is the probability getting heads exactly twice? | 2^7 = 128 is all possible combinations of head and tails for the 7 coin flips. Use 7! / (7-2)!2! for the favorable possibilities. 21/128 |
| Chris can paint a wall in 2 hours, but Pat can paint the same wall in 1.5 hours. How fast could they paint a wall together (in minutes)? | rate = wall/time. Find both rates and then add them together. Once you have that, set up a cross multiplication to find how long it takes to paint one wall. Convert hours to minutes. |
| A rabbit is 54 meters away from a fox (and closer to a bush). The rabbit runs to the bush at 8 meters per second, and it takes the rabbit 12 seconds to reach the bush. How fast is the fox running if it reaches the bush 3 seconds after the rabbit? | Do v * t.= distance to find out how far the rabbit runs. Do 12 s + 3 s = 15 s for how long the fox took to run to the bush. Add both distances together 96 + 54 and put that over the time. |
| How much pure alcohol must be added to a 72 mL solution that is 5% alcohol to make it 10% alcohol? | Pure alcohol = 72 mL × 0.05 = 3.6 mL. Total volume of the new solution = 72 mL + x. (3.6 + x)/(72 + x) = 0.10 |
| HgSO4, H2SO4, H2O as a reagent | Markovnikov addition of OH that turns to a ketone via enol intermediate |
| Which molecule has a strong peak at 1700 cm-1? | Carbonyls would have a strong peak around here, so look for those. |
| How many structural isomers does trichlorobenzene have? | 3, structural or constitutional isomers have the same molecular formula but a different arrangement of atoms. Trichlorobenzene has three structural isomers: 1,2,3-trichlorobenzene, 1,2,4-trichlorobenzene and 1,3,5-trichlorobenzene, shown below. |
| haloform reaction (xs. NaOH, xs. Cl2) H3O+ | Creates a carboxylic acid + haloform (HCX3) |
| (COCl)2, CH3OH | Oxalyl chloride, (COCl)2, converts the carboxylic acid to an acid chloride. When the acid chloride is reacted with an alcohol, an ester is formed. |
| What happens when an acidic molecule interacts with a basic molecule? | A proton transfer will occur. Ammonia will deprotonate the carboxylic acid to form ammonium and a carboxylate ion. |
| Which pair of molecules will result in a reaction that most strongly favors the products? | Equilibrium always favors the formation of the weaker, more stable acid. Therefore, a strong acid in the reactants and a very weak acid in the products will strongly favor the formation of the products. NaOH + CH3COOH. |
| What does the reagent H2O, reflux mean? | E1 reaction |
| Would it be 2-ethylpentanol or 2-ethylpentan-1-ol? | 2-ethylpentanol is too ambigous, so it'd the latter |
| What's more acidic I3CCOOH or F3CCOOH? | F3CCOOH, because it's more electronegative |
Created by:
smurtab