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heterotrophs
organisms that depend on outside sources for food.
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Anaerobic respiratory processes
convert nutrients into energy without air
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Autotrophs
they feed themselves (use solar energy to make the energy)
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Autotrophic anaerobes
feed themselves without oxygen (chemosynthetic bacteria)
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Autotrophic aerobes
feed themselves WITH oxygen (green plants and photoplankton)
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Heterotrophic anaerobes
Need to be fed...don't use oxygen (yeasts)
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Heterotrophic aerobes
Need to be fed...use oxygen (humans, worms, amoebas)
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Organic compounds
No carbon....salts, HCl etc etc
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Organic Compounds
made by living systems and contain carbon (include carbohydrates, lipids, proteins, nucleic acids)
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Protoplasm
the colorless stuff comprising the living part of a cell....cytoplasm, nucleus etc
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Cell theory
- 1. all living things have cells
- 2. The cell is the basic functional unit of life
- 3. Cells arise only from pre-existing cells
- 4. Cells carry genetic info in the form of DNA.
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Resolution
the differentiation of two closely situated objects
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Example of Prokaryotes
Bacteria
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Example of eukaryotes
Protists, fungi, plants, animals
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Nucleus
- controls activities of the cell...including cell division
- surrounded by nuclear membrane
- contains DNA
- Contains Nucleolus (with ribosomal RNA synthesis)
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Ribosome
Sites of protein production and synthesized by the nucleolus.
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Endoplasmic reticulum
- it's a network of membrane enclosed spaces
- transports materials (especially secretable materials)
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Golgi apparatus
it receives vesicles from the smooth ER, modifies it, repackages it into vesicles and distributes it to the cell surface by exocytosis
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Mitochondria
- the site of aerobic respiration within the cell
- supplier of energy
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Cytoplasm
- the liquid part of the cell
- Cyclosis (the way stuff moves in the cell)
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Vacuole
membrane bound sacs involved in the transport and storage of materials that are ingested, secreted, processed, or digested by the cell.
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Centrioles
- a specialized microtubule that's involved in spindle organization during cell division.
- it's in the "centrosome"
- plants don't have them
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Lysosome
membrane bound contains hydrolytic enzymes used in digestion in the cells
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Cytoskeleton
- it's composed of microtubules and microfilaments
- gives mechanical support, shape, and function
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Simple diffusion
the net movement of dissolved particles down their concentration gradients (from high to low)
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Osmosis
the diffusion of water from low solute concentration to high concentration (to dilute the solute)
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Hypertonic
there's more solute compared to the other one
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Hypotonic
there's less solute compared to the other one.
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Isotonic solution
the solute concentration is the same on both sides
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Facilitated diffusion
net movement of particles through special channels or carrier proteins. No energy required.
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Active transport
net movement of dissolved particles against concentration (requires energy and transport proteins)
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Brownian movement
the movement of particles due to kinetic energy which spreads small suspended particles throughout the cytoplasm of the cell.
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Ways to move around in the cell
- 1. Brownian movement
- 2. Cyclosis or streaming
- 3. Endoplasmic reticulum (it has channels through the cytoplasm)
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Enzymes
- lower activation energy
- increase the reaction rate
- doesn't affect the overall delta G
- isn't changed or consumed in reaction
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Are enzymes proteins?
yes
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Substrate
The molecule that the enzyme reacts with
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The active site
Where the substrate and the enzyme bind
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Are enzymes reactions reversible?
Yes
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Reaction rate depends on three things....
- 1. Temperature
- 2. pH
- 3. Concentration of enzyme and substrate
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Do enzymes control hydrolysis?
yes
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Do enzymes help with synthesis?
yes
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What are cofactors?
a nonprotein molecule that helps make certain enzymes active
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What is photosynthesis
the converting of the sun's energy into chemical energy of bonds like glucose
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What is respiration?
The conversion of the chemical energy in bonds into usable energy for the cells
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What bond is the most energy rich bond?
C-H bond
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What is an oxidation reaction?
the removal of high energy H
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What is reduction?
is energy released or gained by reduction?
- the acceptance of the hydrogen atom (by oxygen in the final step)
- Energy is released by reduction (to make ATP)
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What's GLYCOLYSIS
- oxidizes glucose to two molecules of PYRUVATE
- makes two ATP
- makes 2 NADH
- (most of the energy is yet to be released)
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How many ATP does fermentation produce?
2 per glucose
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What is Fermentation?
- when pyruvate is reduced to NAD+
- no oxygen present
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How many ATP does cellular respiration give?
36-38
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Three parts of cellular respiration?
- 1. Pyruvate decarboxylation
- 2. Citric Acid Cycle (krebs cycle)
- 3. Electron Transport Chain
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What's the pyruvate decarboxylation?
the pyruvate enters the mitochondrial matrix where it is decarboxylated (loses CO2) and it's transferred to make a acetyl CoA
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What's the citric acid cycle?
- Also the krebs cycle.
- The 2 carbon acetyl combines with a 4 carbon (oxaloacetate)
- Through a series of reactions 2 CO2 are released and the 4 carbon thing is regenerated.
- NADH and FADH2 are taken to electron transport chain
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Electron Transport chain
- It's located on the inner mitochondrial membrane
- energy is transferred from NADH/FADH2 to oxygen (this helps make ATP)
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What yields the greatest number of ATP per gram?
fats
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Summary of Calvin Cycle
6 co2 eventually form 1 glucoe.....6 Carbon dioxide and 6 RBP (5 carbon molecules) combine and then are converted to one molecule of glucose and recycled to 6 rbp's
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