Key terms & definitions

A small molecule that is joined to others in a particular order to form a protein chain.

A small organic molecule that acts as a building block for proteins.

A small molecule that can join with other amino acids to form a protein.

A building block that joins with other amino acids to form a protein.

A functional group written as –NH₂ in an amino acid.

The Buddha, also called Amida, in whom Pure Land Buddhists place their faith and whose Pure Land is Sukhavati.

The Buddha of Infinite Life, also known as Amitabha or Amida, associated with the Western Pure Land.

The Buddha whose vows and compassion are central to Pure Land Buddhism; known as Amida in Japan.

A Buddha associated with infinite life, whose visualisation and Pure Land are described in the Amitāyus Meditation Sutra; closely associated with Amitābha, the Buddha of infinite light.

A meter connected in series to measure current in amperes.

A meter that measures electric current and is connected in series with the components being tested.

The god honoured at the oracle at Siwa in Egypt, identified by Greeks with Zeus.

A toxic nitrogen-containing substance formed when excess amino acids are deaminated in the liver.

A compound of nitrogen and hydrogen with the formula NH₃, used to manufacture nitrogen-based fertilisers.

A dissolved ion with the formula $NH_4^+$; it is different from ammonia gas, $NH_3$.

The salt $\mathrm{NH_4NO_3}$, used as a nitrogen-containing fertiliser.

A compound containing the ammonium ion, NH₄⁺, together with a negative ion.

A soluble salt containing ammonium ions, NH₄⁺, and sulfate ions, SO₄²⁻.

A loss of memory that can affect memories from before an illness or injury, the formation of new memories, or both.

Protection from punishment granted to a person or group.

A quantity such as gas volume or mass that indicates how much reactant has been used or product has formed.

The amount of substance calculated by dividing its mass in grams by its molar mass in grams per mole.

The quantity of a substance measured in moles, rather than its mass or volume.

A measure of how many specified particles a sample contains, measured in moles.

The unit of electric current. One ampere means that one coulomb of charge passes a point each second.

The unit of electric current. A current of one ampere means one coulomb of charge passes a point each second.

A military operation in which troops land from the sea to attack positions on land.

A military operation in which forces approach by water and land to fight on shore.

An open performance space surrounded by rising levels of seating or galleries.

A building with seating surrounding a central arena, used for spectacles such as gladiatorial combat and animal hunts.