review for the keystone exam
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You will need to understand all of the concepts presented. Review for the keystone exam. Why should you pass this the first time around?. Because remediation is worse than this…. 2 types of cells…. Prokaryotes Eukaryotes -no nucleus- have a nucleus - PowerPoint PPT PresentationTRANSCRIPT
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REVIEW FOR THE KEYSTONE EXAM
You will need to understand all of the concepts presented.
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Why should you pass this the first time around? Because remediation is worse than
this…
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2 types of cells…
Prokaryotes Eukaryotes -no nucleus - have a
nucleus No membrane -have
membrane Bound organelles organellesBACTERIA ONLY Everything
other than bacteria
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What do they have in common? Plasma membrane (cell membrane) Cytoplasm DNA – genetic material Ribosomes- make protein
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What do alveoli do for the lungs?
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States of matter for water Most dense – liquid (water) Middle density – ice (solid) Least dense- water vapor (gas)
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In a Lake….
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Carbon
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Hydrolysis- adding water to split
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Dehydration Synthesis- removing water to connect
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Enzymes! They are proteins They speed up (catalyze) chemical
reactions They are not consumed or affected in
the reaction They have an active site where the
substrate bonds
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What affects the rate of enzyme activity? Temperature
Higher temps speed up reactions
Lower temps slow down reactions
pH Each enzyme has a specific pH
at which is operates best.
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pH- Scale
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Chloroplast A green organelle found within plant
cells Site of photosynthesis – converting
light energy into chemical energy
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Cellular Respiration
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Cellular Energy - ATP!!
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Transport- passive Movement of molecules through a
cell membrane. Without using energy- they will move
from high concentration to low Thus they are moving WITH the concentration gradient .
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Transport- Active Movement across a membrane from
low concentration to high concentration.
Requires ATP (energy)
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Rough Endoplasmic Reticulum Organelle within eukaryotic cells. Has ribosomes attached that make
proteins for the cell.
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Golgi Apparatus
An organelle in eukaryotic cells Packages and processes cellular
products
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What is homeostasis?
Processes an organism uses to regulate its internal environment.
Example- when you are hot you sweat, when you are cold you shiver.
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Mitosis Division of the nucleus of a body
(somatic) cell Cloning of the cell- NO change to the
DNA One division
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Meiosis
Division of the nucleus of sex cells Creates sperm and egg Genetic variation arises through this
process There are 2 divisions in meiosis You start with one cell and end up
with 4
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Draw a punnet square
21. Punnet Squares
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Deletion: genes are completely deleted
Insertion: Genes are added Inversion: Flipping of genes Translocation: Genes move from one
chromosome to the next
22. Chromosome Variation
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23. Pro vs. Eu
Prokaryotes Eukaryotes no nucleus - have a nucleus
No membrane -have membrane Bound organelles organellesBACTERIA ONLY Everything other
than bacteria
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The rough endoplasmic reticulum manufactures membranes and secretory proteins
Go through and cross off incorrect answers.
24. Endoplasmic Reticulum
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25. DNA and Phenotypes
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Cross out incorrect answers Genetic variation and diversity good Unplanned ecosystem interactions is
the answer
26. Genetics
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Natural Selection Mechanism of Evolution Organisms with “bad” genes won’t make
it to reproduction age while organisms with “good” genes will reproduce more
Cross off incorrect answers
27. Natural Selection
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DNA