Lecture 3 - Origin of life and Microbes, microbial evolution, metabolism and diversity

evidence for microbial life can be found in rocks that are ______ old

Earth formed ___

oceans formed

Stromatolites

Alexander Oparin & JBS Haldane

planetary science

Primordial soup

Harold Urey 1950's

stanley miller

what did miller's experiment find?

what is still revealing secrets of early solar system?

microfossils from apex chert, australia are how old?

surface origin hypothesis

subsurface origin hypothesis

Marine hydrothermal vents

Montmorillonite

RNA world

RNA has the ability to act as both _____ and ______

RNA can be transcribed into ____ in reverse of the normal process of ______

early life may be based on RNA to:

What are the RNA properties in support of RNA-based protocell

significance of replicase

montmorillonite & rna

Lipid membrane

Fatty acids vs. phospholipids

red tagged rna molecule bound to _____ in a lipid vesicle

first organism

when does competition emerge?

eventually rna could have given rise to structurally similar double stranded ____

LUCA

what happens when o2 becomes freely available?

evolution of luca

what kind of metabolism could LUCA have had?

environment?

menu-of luca

metabolisms in modern microorganism

gram positives have ___ membrane

to obtain energy organisms ____ molecules or use light

we are ______ that mainly oxidase organic compounds like glucose to obtain CO2 and H2O to C, reducing power and energy

oxidative phosphorylation:

glycolysis

tricarboxulic acid/krebs/citric acid cycle

electron transport chain (aerobic resp)

gram positive bacteria when

redox tower

oxidation process

what happens as electrons are transferred?

Substrate-level phosphorylation

oxidative phosphorylation

anaerobic respiration

luca environment and menu

luca's metabolism

hyperthermophiles can live in

Pyrolobus fumarii can live at ____ in submarine hydrothermal vents
Aquifex aeolicus grows near volcanoes or hot springs at temperatures up to _____ degrees

modern chemolithotrophs

terminal acceptors may be

if organic sources of carbon are available for energy

H2 based metabolism produces

first cell..

phototrophic organisms

photosynthesis

electron source of photosynthesis

oxygenic photosynthesis

anoxygenic photosynthesis

stromatolites

chloroflexus

anoxygenic photosynthesis

chlorobi

chlorosomes:

chlorosome

cyanobacteria (oxidative phosphorylation)