BIOL380 Week 2
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How do Peroxisomes degrade molecules?
What is the byproduct of Peroxisomes' degradation via oxidation?
Hydrogen Peroxide H2O2
What is the problem with H2O2 in the cell?
It is very reaction and can destroy biological molecules.
What do Peroxisomes have to deal with the problem of H2O2 in the cell?
What does Peroxisomes' Catalase Enzyme do to H2O2?
Converts it to Water H2O
Describe the general structure of Vacuoles.
Single membrane & large in size
What are the three types of Vacuoles?
What is the function of the Food Vacuole?
Carries the food that provides energy for the cell.
What is the function of the Central Vacuole?
- May store food, but can also store:
- Waste Products
What is the function of the Contractile Vacuole?
To regulate water
What does Hypertonic mean?
More solutes inside the cell
What does Hypotonic mean?
Less solutes outside the cell
What is Osmosis?
Movement of water from High concentration to Low concentration
How do Contractile Vacuoles regulate water?
They pump H2O out as Water Level inside the cell increases due to Osmosis
In regards to the Plasma Membrane, Cytoplasm, Nucleus, Nucleolus, Membrane Bound Organelles, and Ribosomes, which of these do the Prokaryotes not have?
- Membrane-Bound Organelles
For Eukaryotes, define Compartmentalization of Function.
It means that specific areas of the organism/cell are required for particular functions.
Describe the Miller/Urey Experiment.
They set conditions as closely and imaginably possible to prehistoric conditions. They added head & electricity to inorganic molecules and obtained small organic molecules.
From the Miller/Urey Experiment results, what could be deduced regarding Amino Acids?
Amino Acids will stick together via Condensation Reactions in a water environment resulting in Polymers
From the Miller/Urey Experiment results, what could be deduced regarding Polymers?
Polymers could give rise to RNA, which in turn gave rise to Replication
From the Miller/Urey Experiment, what was deduced to be the first genetic material, DNA or RNA?
Precursor (ancestor) to the Cell
Which were assumed to come FIRST. Phototrophs, Organotrophs, or Autotrophs?
Define Symbiosis in regards to the Predator-Prey Relationship of Organotrophic Prokaryotes.
The Predator Prokaryote and the Prey Prokaryote would have a positive-positive relationship.
What is the evidence that these Prey Prokaryotes that had symbiotic relationships with Predators eventually gave rise to current organelles? Why?
Chloroplasts and Mitochondria. Because they both have their own DNA separate from the DNA of the cell & that their DNA resembles Bacterial DNA.
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