Cells and Biochemistry
A ribosome reads an mRNA sequence and joins amino acids into a polypeptide. This stage of gene expression has this name.
What is translation?
In normal adult circulation, these blood vessels carry oxygen-rich blood from the lungs into the left atrium.
What are the pulmonary veins?
A solution contains 0.20 mol of NaCl in a final volume of 500 mL. This is its molar concentration.
What is 0.40 mol/L?
In April 2026, NASA’s Artemis II astronauts, including Canada’s Jeremy Hansen, travelled around this natural satellite of Earth.
What is the Moon?
A quadratic function is y = 2(x − 3)² − 8. These are the coordinates of its vertex.
What is (3, −8)?
An enzyme inhibitor occupies the active site. Increasing substrate concentration reduces its inhibitory effect. This type of inhibition is occurring.
What is competitive inhibition?
Sharks and dolphins independently evolved streamlined bodies despite belonging to different vertebrate groups. This evolutionary process explains the similarity.
What is convergent evolution?
At 25 °C, a strong acid solution has [H₃O⁺] = 1.0 × 10⁻³ mol/L. This is its pH.
What is 3.00?
A 2.0 kg cart moving at 3.0 m/s hits a stationary 1.0 kg cart. They stick together on a frictionless track. This amount of kinetic energy is lost in the collision.
What is 3.0 J?
This is the real value of x satisfying log₂(x − 1) = 3.
What is 9?
An animal cell with an internal concentration of 0.30 Osm/L is placed in a 0.60 Osm/L solution. The solutes cannot cross its membrane, but water can. This is the net direction of water movement.
What is out of the cell?
The 2026 Nobel Prize in Physiology or Medicine honoured discoveries behind this technique, which uses light-sensitive proteins to control genetically modified neurons.
What is optogenetics?
For N₂(g) + 3H₂(g) ⇌ 2NH₃(g), the container volume is suddenly halved at constant temperature. This is the direction of the equilibrium shift.
What is toward the products or to the right?
An object moves in a circle of fixed radius. If its speed doubles, its centripetal acceleration increases by this factor.
What is four?
These are all solutions of 2sin(x) = 1 for 0 ≤ x < 2π, in radians.
What are π/6 and 5π/6?
A DNA template strand reads 3′–TAC GGA ATT–5′. This is the complementary mRNA sequence, written 5′ to 3′.
What is 5′–AUG CCU UAA–3′?
A storm randomly kills most members of a population, regardless of their traits. Allele frequencies in the survivors differ by chance. This evolutionary mechanism is responsible.
What is genetic drift?
A 25.0 mL HCl sample requires 20.0 mL of 0.150 mol/L NaOH for complete neutralization. This is the HCl concentration.
What is 0.120 mol/L?
An electron starts from rest and is accelerated through a potential difference of magnitude 200 V. Ignoring losses, it gains this kinetic energy in electronvolts.
What is 200 eV?
An infinite geometric series has first term 12 and common ratio −½. This is its sum.
What is 8?
A cell membrane protein pumps ions from low concentration to high concentration and obtains the required energy directly from ATP hydrolysis. This type of membrane transport is occurring.
What is primary active transport?
Blood CO₂ rises and blood pH falls. In a normal homeostatic response, this change in ventilation helps return pH toward normal.
What is increased ventilation?
For AgCl(s) ⇌ Ag⁺(aq) + Cl⁻(aq), Ksp = 1.8 × 10⁻¹⁰. If [Ag⁺] = 2.0 × 10⁻⁵ M and [Cl⁻] = 2.0 × 10⁻⁵ M immediately after mixing, this is whether precipitation is favoured.
What is yes or AgCl precipitates?
An October 5, 2026 PPPL fusion report identified a low-energy route to ignition through this named saddle: the pass separating plasma that needs external heating from plasma that sustains its own burn.
What is the Cordey saddle?
Solve √(x + 5) = x − 1 over the real numbers. This is the only valid solution.
What is 4?