BIOLOGY
Which organelle is responsible for producing most ATP during aerobic respiration?
Mitochondrion
Define a Brønsted–Lowry acid and a Brønsted–Lowry base
An acid is a proton donor; a base is a proton acceptor
What is the difference between a scalar and a vector quantity?
A scalar has only magnitude; a vector has both magnitude and direction.
Isaac Newton explained this force. It pulls objects towards Earth and keeps planets moving around the Sun
Gravity
The first Principal of Quantum TECH
Sagadatova D.E.
What type of covalent bond joins two amino acids together during a condensation reaction?
Peptide bond.
MgO has a much more exothermic lattice enthalpy than NaCl. Explain this using two factors
Mg²⁺ and O²⁻ have higher ionic charges than Na⁺ and Cl⁻, producing stronger electrostatic attraction. Their ionic radii are also smaller overall, so the ions are closer together
According to the kinetic theory of gases, what does the average kinetic energy of gas molecules depend on?
It depends only on the absolute (Kelvin) temperature of the gas
In 1928, Alexander Fleming discovered this antibiotic after seeing that bacteria did not grow near a mould
penicillin
How many lanes are there in the school swimming pool?
5
A cell measures 60 mm in a micrograph, but its actual length is 15 μm. What is the magnification?
×4000
Using a Born–Haber cycle, calculate the lattice enthalpy of MgO. Data (kJ mol⁻¹): ΔHf° = −602 Mg atomization = +148 IE₁ of magnesium = +738 IE₂ of magnesium = +1451 ½O₂ → O = +249 EA₁(O) = −141 EA₂(O) = +744
-3791 kJ/mol
A ball is thrown at a wall and bounces back with the exact same speed. What type of collision is this?
elastic collision
Take +300
giftcard
How many students are graduating from our school this year?
80
An enzyme-controlled reaction reaches its maximum rate even though substrate concentration continues to increase. Explain why the reaction rate does not increase further.
All enzyme active sites are occupied by substrate molecules. The enzyme is saturated, so adding more substrate cannot increase the reaction rate
A buffer solution contains 0.20 mol CH₃COOH and 0.30 mol CH₃COONa .Calculate the pH. Ka of ethanoic acid is 1.8 × 10⁻⁵ mol dm⁻³
pH=4.92
A stationary cannon fires a heavy cannonball forward, causing the cannon to recoil backward. Which law explains why the backward force on the cannon is equal in magnitude to the forward force on the cannonball?
Newton's Third Law of Motion/ Conservation Law of momentum
Rosalind Franklin’s images helped scientists discover DNA’s shape. It looks like a twisted ladder. What is this shape called?
double helix
Quantum TECH School emphasizes student responsibility for their learning environment through a dedicated weekly 15-minute cleanup period built directly into the schedule. What is the traditional Japanese term used for this activity?
SOUJI
A DNA molecule containing only ¹⁵N is transferred to a medium containing only ¹⁴N. After three rounds of semi-conservative DNA replication, what percentage of DNA molecules still contain ¹⁵N?
25%
Why does aluminium chloride (AlCl₃) show significant covalent character despite being composed of a metal and a non-metal?
The small, highly charged Al³⁺ ion strongly polarises the electron cloud of Cl⁻, producing covalent character
Explain the difference between specific heat capacity and specific latent heat.
Specific heat capacity is the energy required to raise the temperature of 1 kg of a substance by 1 K (or 1°C), without a change of state. Specific latent heat is the energy required to change the state of 1 kg of a substance (e.g., from solid to liquid, or liquid to gas) at constant temperature, with no change in temperature during the process.
In 1911, Ernest Rutherford conducted the gold foil experiment, which challenged Thomson's atomic model.
If most alpha particles passed straight through the gold foil, but a very small number were deflected through angles greater than 90°.
What did this show about the space inside an atom?
mostly empty space
Name the exact date Science Fest takes place every year
26th of February