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113 Cards in this Set
- Front
- Back
List the steps of the Scientific Method:
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1.Observe and form question
2.Research 3.hypothesis 4.experimentation/collect and analyze data 5.conclusion 6.repeat work 7.Theories and laws formed after enough trials have been done and repeated results are seen. |
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Double Blind Verification
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Conclusions and results are sent out anonymously to scientists who were not involved in the original work, because everything is anonymous, all evaluators and scientists are unknown which assures no bias occurs.
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What is the Scientific Method?
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The scientific method is a required procedure that solves problems and proves validity and consistency in science.
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Control Group
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The standard used for comparison against other experimental groups.
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Variable/Experimental Group
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A group that is compared to the control group and is tested on/exposed to the variable.
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What is the difference between a hypothesis and a theory?
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A hypothesis is a testable explanation that has no proof of validity, a theory has been tested on multiple times, and is accurate.
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Independent Variable
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An independent variable is the variable that is varied or manipulated. The independent variable goes on the x-axis.
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Dependent Variable
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The dependent variable is the variable being effected by the independent variable. The dependent variable goes on the y-axis
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Biology
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The scientific study of life
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What is the Cell Theory?
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1. All living things are cellular.
2. Cells are the smallest functioning unit in all living things. 3. Cells come from prexisting cells. |
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Hans Janssen
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invented the first compound microscope
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Robert Hooke
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first to use the word "cell", saw the cell wall of a cork plant.
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Anton Van Leeuwenhoek
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first to observe living cells (teeth scrapings). Called them "animalcules".
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Matthias Schleiden
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first to observe that all plants are made up of cells.
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Theodore Schwann
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first to put into concept that all living things are cellular.
*contributes to the first part of the cell theory |
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Rudolph Virchow
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discovered that cells come from pre-existing cells. He disproved the theory of spontaneous generation.
*contributes to the third part of the cell theory |
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Mitochondria
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makes energy for all eukaryotic cells. Has a cristae and 2 membranes(inner & outer)
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Nucleus
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the controlling organelle of the cell that contains the DNA
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Nucleolus
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contains the RNA and is inside of the nucleus
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Cell Membrane
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controls the movement of materials in and out of the cell
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Cell Wall
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protects and physically supports a cell; it goes around the plasma membrane and is only seen in plants
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Plastid
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organelles that function in photosynthesis or storage in plants
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Chloroplasts
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an energy organelle that photosynthesis occurs in. Contains thylakoid disks and stroma
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Amyloplasts
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organelles that are pigment free and store starch grains
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Golgi Body
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packages items inside the vesicle for shipment
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Nuclear Envelope
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surrounds the nucleoplasm. Like a cell membrane, it control what enters and leaves the nucleus
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Microtubles
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largest component of the cytoskeleton, is used to help keep organelles and cell structures in place or move them to new locations.
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Intermediate Filaments
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the second largest component of the cytoskeleton
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Microfilaments
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The smallest component of the cytoskeleton used for cell shrinkage, movement, and structural support
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Endoplasmic Reticulum
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the organelle existing in the cytoplasm that helps with transportation
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Smooth ER
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Part of the endomembrane system that lacks ribosome attatchement.
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Rough ER
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the production site of ribosomes
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Lysosome
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performs intracellular digestion
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Centriole
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is used in animal cell reproduction
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Prokaryotic Cells VS Eukaryotic Cells
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Prokaryotes: If a cell wall is present, contains pepidoglycon and is complex. It is smaller in size, has no membrane bound organelles except ribosomes, and has circular DNA.
Eukaryotes: If a cell wall is present, in contains cellulox and is simple. It is larger in size, contains all organelles, and has helical, linear, double-stranded DNA. |
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Organizations of Life
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1. Atom
2. Molecule 3. Cell 4. Tissue 5. Organ 6. Organ-system 7. Multi-celled organism 8. Population 9. Community 10. Ecosystem 11. Biosphere |
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Fluid Mosaic Model
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describes the structure of the cell. The fluid is smooth by lipid tails repelling water and the mosaic is bumpy with phosphate heads.
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Adhesion Protein
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helps form tissues
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Communication Protein
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sends out chemical messages to other proteins
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Receptor Proteins
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allows a cell to respond to other cells chemically communicated message
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Recognition Protein
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allows you immune cells to identify other cells as "friends"
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Transport Protein
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transports large materials in and out
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Glycoprotein
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tells cells when to stop dividing and where their neighbor cells are
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What is the volume formula?
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length x width x height
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What is the surface area formula?
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length x width x number of sides
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Surface-to-volume ratio
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restrains increase in cell size. An objects volume increase with the cube of its diameter and the surface area increase with the square
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Carbohydrates
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>0H
>used for energy and structure >made up of saccarides >EX: PASTA |
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Proteins
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>NH2
>used to form tissue and cell membrane gates >made up of amino acids that bond together using peptide bonds >EX: MEAT & EGG |
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Nucleic Acids
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>P
>makes up your RNA and DNA >made up of monomers called nucleotides, which are phosphate, sugar, and a nitrogenous base |
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Lipids
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>C=O-OH
>used for insulation, cell membrane structure, and energy >made up of 3 fatty acids and 1 glycerol >EX:OIL, BUTTER |
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Sterols
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a special modified lipid in which the fatty acids are arranged in a ring format.
EX: STEROIDS |
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Phospholipids
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if we remove one fatty acid and add a phosphate
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Carbon Traits
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Carbon is abundant, stable, versatile, and able to share a 4 outer valence electrons. Carbon is what makes a compound organic
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Catabolic
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breaking down
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Anabolic
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building up
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When is an atom in nirvana?
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When its valence is filled to the maximum occupancy
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Atomic Number
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number of protons
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Mass Number
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number of protons + neutrons
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How do you find the number of neutrons in an atom?
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mass number(rounded) - atomic mumber
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Ionic Bond
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transfer of electrons from one atom to the other
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Covalent Bond
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atoms share electrons in their valence to fill it
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Polar Covalent Bond
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atoms share electron unequally and there is a slight charge.
HYDROPHILIC |
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Non-Polar Covalent Bond
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atoms share electron equally and there is no charge.
HYDROPHOBIC |
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Cation
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an ion that gives away electrons and becomes positivly charged
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Anion
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an ion that gains electron and becomes negativly charged
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1st Law of Thermodynamics
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Energy/mass cannot be created or destroyed, only converted
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2nd Law of Thermodynamics
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Energy/mass cannot be converted at 100% efficiency
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pH
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the percent of hydrogen in H's or -OH's
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Acid
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the pH must be below 7 and it contains H's
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Base
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the pH must be above 7 and it contains -OH's
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Properties of Water
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polar covalent bond, temp. stabalizing, universal solvent, cohesive, ahdesive, neutral pH, less dense as a solid
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Passive Transport
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no energy required, moves with the concentration gradient
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Active transport
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energy required, moves against the concentration gradient
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Osmosis
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the movement of water from a high to low concentration
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Diffusion
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the movement of substances from a high to low concentration
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Endocytosis
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moving things inside the cell
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Exocytosis
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moving things out of the cell
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Aerobic
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requires oxygen
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Anaerobic
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absence of oxygen
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Energy
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the ability to do work
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Cellular Respiration
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Cellular Respiration:
Formula: C6H1206 + 602 -> 6CO2 + 6H2O + ATP +Heat Cellular Respiration is the process in which heterotrophs break down carbohydrates (glucose) to make ATP. It takes place in the mitochondria. |
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Glycolysis
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Glycolysis: (takes place in the cytoplasm of the cell)
*gross ATP= 4, net gain=2* •The 6 carbon glucose is broken down into two 3 carbon Pyruvates. •ATP is used to break down glucose into Pyruvates. •This is an anaerobic process. |
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Citric Acid Cycle
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Citric Acid Cycle: (takes place inside the mitochondria, but outside the cristae)
•Each pyruvate is broken down further. •The CO2 from the broken Pyruvates are released as a waste product. •NAD captures the hydrogen ions to be used for later. •This is an aerobic process |
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Electron Transport Chain
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Electron Transport Chain: (takes place in the mitochondria, past the cristae)
•Hydrogen ions are moved using NAD to the cristae. •Hydrogen leaves the carrier NAD to go across the cristae and to oxygen. The hydrogen and oxygen bond together to make water. •While moving across the cristae and to the oxygen, hydrogen creates a lot of energy that in turn is used to power the anabolic build of ATP. •Once ETC is completed, chemi-osmosis is performed to move the water and ATP out of the mitochondria for use. |
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Photosynthesis
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Photosynthesis:
Formula: 6CO2 + 6H20 + ATP > C6H1206 + 602 The process in which autotrophs use ATP and sunlight to combine water (H20) and carbon dioxide (CO2) together to make glucose (C6H1206). It takes place in the chloroplast. |
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Light Reactions
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Light Reactions (takes place in the thylakoid disks):
Formula: •Light hits the electrons in the pigment Chlorophyll causing energy to be released. •The energy released is used to split the water, this process is called photolysis. •Once the water is split, NADP comes to pick up the hydrogen to take it to the stroma. •ATP is charged while this is all taking place |
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Calvin Cycle
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Calvin Cycle: (takes place in the stroma)
•ATP and NADPH are moved to the stroma. •The stroma has pores called stomata that are watched by guard cells that allow carbon dioxide (CO2) to come in and oxygen to be released as a waste product. •ATP is then used to bond the hydrogen taken from the NADPH to the carbon and oxygen we get from carbon dioxide (CO2). •Finally, we get glucose (C6H1206). |
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G1
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46 chromosomes; cell growth
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S
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92 chromosomes; DNA replication
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G2
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92 chromosomes; preparation for mitosis
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M
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46 chromosomes; mitosis/ division of the nucleus
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Cytokinesis
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46 chromosomes; division of everything else
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Haploid
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cell with half the number of chromosomes
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Diploid
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cell with regular number of chromosomes
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Somatic
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cell of the body
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Gametic
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sex cell
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Sexual Reproduction
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sperm + egg= zygote
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Zygote
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fertilized egg
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What did Watson and Crick discover?
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realized DNA was the molecule of inheritance and produced the 1st 3D model
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What did Franklin do?
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she provided the first x-ray of DNA
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What did Meselson and Stahl do?
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discovered DNA replication and semi-conservative replication
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What did Chargraff do?
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discovered the nucleotide bonding rules
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Prophase
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Nuclear envelope and nucleolus breaks downs and becomes invisible. Chromosomes are visible
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Metaphase
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Copied Chromosomes line up in the middle of the cell
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Anaphase
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Chromosomes and the copy are pulled to opposite ends of the cell
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Telophase
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2 new nuclear envelopes reappear
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Cytokinesis
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follows mitosis to copy all other parts of the cell
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List the steps of Meiosis
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Interphase:92
P1:92 M1:92 A1:92 T1:46 Cytokinesis:46 Interkinesis:46 P2:46 M2:46 A2:46 T2:23 |
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Meiosis
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process of making gametes(sperm and egg)
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Mitosis
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nuclear division of somatic cells
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Ethanol Alcohol Fermetation
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Occurs after Glycolysis. Happens to yeast. When fngi break down matter and release alcohol and carbon dioxide
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Lactic Acid Fermetation
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Occurs after Glycolysis and happens to muscles when animals run out of oxygen. A build up of lactic acid causes soreness
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How to replicate DNA
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1. unwind double helix using helicase to break the hydrogen bonds
2. stabalize open strands with histones 3. copy DNA using DNA polymerase 4. check for errors using DNA ligase |