Definitions

Enzyme used to produce pure samples of L-amino acids

Non living conditions in a habitat

The fall of leaves

Molecule that enter the Krebs cycle from glycolysis through a linking reaction when coenzyme a combines with acetyl group

Addition of acetyl group

The change in the potential difference across the neurone membrane of the axon when stimulated, approx +40 mV

The energy required to initiate a reaction

Area of an enzyme with a shape complementary to a specific substrate, allowing the enzyme to bind a substrate with specificity

Movement of particles across a plasma membrane against a concentration gradient, energy is required

A nucleotide composed of a nitrogenous base ( adenine ), a pentode sugar and two phosphate groups. Formed by the hydrolysis of ATP, releasing a phosphate ion and energy

A nucleotide composed of a nitrogenous base ( adenine ), a pentose sugar and three phosphate groups. The universal energy currency of cells

Chemicals ( antibodies ) that cause pathogens to clump together so they are easier for phagocytes to engulf and digest

Fermentation that results on the production of ethanol

Bitter tasting compounds found in plant leaves that may affect the metabolism of animals or insects eating them or poison them

Version of a gene

Different versions of the same gene

Speciation that occurs as a result of a physical barrier between populations

Monomer used to build polypeptides an thus protein

Conversion of nitrogen compounds in dead organic matter or waste into ammonium compounds by decomposers

Steroids drugs used illegally by some athletes or bodybuilders to increase body mass

Reaction of metabolism that construct molecules from smaller units, these reactions require energy from the hydrolysis of ATP

Respiration in the absence of oxygen

Structures that have adapted to perform the same function but have a different origin

Third stage of mitosis when chromatids are separated to opposite poles of the cell