Orgins of life and organic molecules

Theories on Origins of Life

in caves, brought by asteroids, formed from

chemicals in the atmosphere (primordial soup),

deep ocean vents

All life comes from

Chemistry

Biogenesis

ife comes from life

Theory on first life on earth

single celled bacteria (prokaryotic), likely

chemotroph, likely anaerobic (no oxygen)

Independent variable

The variable that is changed (tested) in an

experiment

Dependent variable

the variable that is measured in an experiment

(what changes at the end)

Constant/Controlled variables

Variables that stay the same between all tested

groups

Characteristics of life that viruses have

Evolution, contains DNA

Characteristics of life viruses do not have

reproduction, metabolism, respond to

environment cells, homeostasis, growth and develop

Levels of organization

atom , molecule,cell,tissue,organ,organ system, organism

Origins of life

• deep ocean vents

• underground

• outer space

• chemical “ soup “

Characteristics of life

• contains genetic material

• adapt and evovle

• made of cells

• maintain homeostatis

• grow and develop

• metabolism

• responds to stimuli

6 esstenial elements for life

CHNOPS

• carbon

• hydrogen

• nitrogen

• oxygen

• phosphorous

• sulfur

First life

• prokaryotic

• chemotrophic

• signle-celled

• anaerobic

Spontaneous generation

life can come from non-living things

biogenesis

life can only come from other life

Carbohydrate

monomer : glucose , monossachiride

function : primary energy source

examples : plant structure , pasta bread

lipids

monomer : fatty acids

function : long-term energy storage

examples : butter , cholestrol

Protein

monomer : amino acids

function : speed up chemical reaction

examples : meats , beans

Nucleic Acid

monomer : nucleotide

function : contains genetic information / material example : DNA , RNA

Dehydration synthesis

process that joins together monomers and turns them into polymers . water is created / left behind

Hydrolsis

processes by which polymers break into monomers