Shapes of Molecules

The shape of a molecule determines many of its properties; For example: C4H10 is the formula for 2 separate molecules n-butane and isobutene Melting Point    -138°C                   -159°C Boiling Point     -0.5°C                    -12°C Enzymes—shape compatible with those molecules whose reactions they promote i.e.  the enzyme sucrase breaks down the sugar molecule sucrose The shape of a…

Enthalpy Change

Enthalpy change is also known as heat of reaction, enthalpy of reaction, change in heat content. Enthalpy = total energy of a system It is impossible to measure the total kinetic and potential energy of a system, so instead we measure enthalpy change (using calorimeters). Enthalpy Change –  is the energy absorbed from or released…

What is Bioamplification?

Bioamplification is the accumulation of toxic pollutants in an animal. Toxins can be removed from the bodies of animals through sweating and urination, but these toxins need to be water soluble. DDT, DDE, PCBs, toxaphene, and the organic forms of mercury and arsenic do biomagnify in nature. These substances are consequently known as ‘persistent organic…

Human Karyotyping

A karyotype is an organized profile of a person’s chromosomes. Chromosomes are arranged and numbered according to: – size, from largest to smallest – banding pattern, size and location of Giesma bands – centromere location, appear as a constriction This arrangement helps scientists quickly identify chromosomal alterations that may result in a genetic disorder. Karyotype…