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BIO 1130 Lecture Notes - Phanerozoic, Cell Membrane, Hydrophile

Course Code
BIO 1130
Jon Houseman

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Keywords for Unit 2: Hadean Eon
The interaction of dissimilar molecules in which they are attracted to each other
Water demonstrates this which makes it a good solvent, in fact known as the universal solvent
Adhesion causes the meniscus in water or aqueous solutions as the water adheres to the glass
Archaean eon
The second geological eon
Precedes Proterozoic eon and is preceded by Hadean eon
Begins 3.8 billion years ago
Anaerobic bacterial life
Oxygen begins to accumulate
The building blocks of biopolymers
Used to form sugars, nucleic acids and polypeptides
Creation of biomonomers in an experiment such as the miller experiment suggests that it would
be possible for life to evolve from non-living matter
Polymers produced by living organisms
Made up of biomonomers
Include sugars, polypeptides and nucleic acids
The basis of all life on earth

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All organic molecules contain carbon as it is highly useful forming four bonds
Extremely common
Central dogma of biology
Proteins are responsible for the functional aspects of the living world
DNA is self replicating
A protein cannot be used to create DNA
Chemical evolution
A theory as to how life evolved on earth
Life evolved on earth from non-living matter via chemical reactions
Attempts to account for both metabolism and replication
The interaction of identical molecules in which they are attracted to one another
Water exhibits this property due to its polar nature
Cohesion is the property of water that allows surface tension
Crystal lattice of water
Water forms a crystal lattice when it solidifies which results in it being less dense and expanding
in size
The crystal lattice is formed due to its ability to form hydrogen bonds
As the water cools it loses the energy to resist the bonding, which because of its polar nature
occurs in a crystal lattice structure

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The emergence of complex things from simple processes or a series of simple processes
More than the sum of the parts
Is fundamental to understanding the genesis of life
Occurs in water
Is the process by which a liquid becomes a gas
Requires energy input
Geological time scale
Provides a scale by which scientists can classify the different periods in earth’s geological history
Composed of many eras, hadean, archean, proteozoic, phanerozoic
Eras punctuated by major events or changes
Green house gases
Gasses which trap radiation in the atmosphere causing an increase in energy on the planet,
generally heat
Prevents the planet from cooling rapidly every night
An important part of our atmosphere
Hadean eon
The first geological era preceding Archaen eon, building phase, stabilizing phase
Began with the formation of earth 4.6 billion years ago ends 3.8 billion years ago
Formation of solar system and planet, ends with origins of life
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