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Life Builds from the Bottom Up
Life Builds from the Bottom Up

... proportion • The fundamental pattern is the same ...
The atmosphere is 78% N2. All organisms need nitrogen to make
The atmosphere is 78% N2. All organisms need nitrogen to make

... ...
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Micro Ch 3 Study Guide

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... messenger • Cell systems harnessed for replication ...
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Yr 12 ORIGINS OF LIFE ON EARTH MA File

... around 3.8 billion years ago. These first life forms consisted of singe celled microbes ‘prokaryotes.’ More complex singe cells are believed to have evolved later, the ‘eukaryotes.’ ...
Chapter 4: Functional Anatomy of Prokaryotic and Eukaryotic Cells
Chapter 4: Functional Anatomy of Prokaryotic and Eukaryotic Cells

... 9. An extracellular enzyme (amylase) hydrolyzes starch into disaccharides (maltose) and monosaccharides (glucose). A carrier enzyme (maltase) hydrolyzes maltose and moves one glucose into the cell. Glucose can be transported by group translocation as glucose-6-phosphate. ...
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Crossing The Membrane Worksheet

... Crossing The Membrane Worksheet ...
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PROKARYOTIC CELLS (Chapter 4): **DNA not enclosed by

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National 5 Biology Homework 10 Name

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The Evolution of the Cell
The Evolution of the Cell

... Conditions on Earth 4 billion years ago were very different than they are today. The atmosphere lacked oxygen, and an ozone layer did not yet protect Earth from harmful radiation. Heavy rains, lightening and volcanic activity were common. Yet the earliest cells originated in this extreme environment ...
Viruses and Bacteria - (www.ramsey.k12.nj.us).
Viruses and Bacteria - (www.ramsey.k12.nj.us).

... • Viral infection of plant cells – Cannot penetrate cell walls unless they are damaged – Spread by insects that feed on plants or by infected seeds ...
Moneran/Prokaryotic Organism Subclassification Kingdom? Division
Moneran/Prokaryotic Organism Subclassification Kingdom? Division

... Moneran/Prokaryotic Organism Subclassification All members of these groups are prokaryotic. The Archaee differ from the Eubacteria in that Archaea have introns, cell membrane lipids with ether binds rather than ester bonds between glycerol and fatty acids, lack peptidoglycan (cell wall polymer) whic ...
the evolution of the cell
the evolution of the cell

... volcanic activity were common. Yet the earliest cells originated in this extreme environment. Today, a group of single-celled organisms called archaeabacteria, or archaea, still thrive in extreme habitats. Astrobiologists are now using archaea to study the origins of life on Earth and other planets. ...
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Unique properties of hyperthermophilic archaea

This article discusses the Unique properties of hyperthermophilic archea. Hyperthermophiles are organisms that can live at temperatures ranging between 70 and 125 °C. They have been the subject of intense study since their discovery in 1977 in the Galapagos Rift. It was thought impossible for life to exist at temperatures as great as 100 °C until Pyrolobus fumarii was discovered in 1997. P. fumarii is an unicellular organism from the domain Archaea living in the hydrothermal vents in black smokers along the Mid-Atlantic Ridge. These organisms can live at 106 °C at a pH of 5.5. In order to get energy from their environment these organisms are facultatively aerobic obligate chemolithoautotrophs, meaning these organisms build biomolecules by harvesting carbon dioxide (CO2) from their environment by using hydrogen (H2) as the primary electron donor and nitrate (NO3−) as the primary electron acceptor. These organisms can even survive the autoclave, which is a machine designed to kill organisms through high temperature and pressure. Because hyperthermophiles live in such hot environments, they need to have DNA, membrane and enzyme modifications in order to withstand the intense thermal energy. Such modifications are currently being studied to better understand what allows an organism or protein to survive such harsh conditions. By learning what allows these organisms to survive such harsh conditions, researchers will be better able to synthesize molecules that are harder to denature that can be used in industry.
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