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Bio 1 Chp.3 Test

How do you calculate TOTAL magnification for a lens on a microscope? Multiply the eyepiece (10X) by the power of the objective
What materials are needed to make a wet mount slide? iodine, glass slide, cheek cells, toothpick, slide cover, and onion cells
List in order from smallest to largest: Cell,Atom, Organelle, Molecule, Organism Atom, Molecule, Organelle, Cell, Organism
What does the Cell Theory state? -All organisms are made of cells -All cells are produced by other living cells -Cells are the most basic unit of life
What are the differences and similarities between Prokaryotic and Eukaryotic cell? What are examples of each? -They both have DNA EU- have a nucleus and membrane-bound organelles (can be multi- or uni-cellular PRO- have NO nucleus or membrane bound organelles (Uni-cellular only)
What cell organelle produces ATP? Mitochondria
What are some differences between plant and animal cells? Type of organelles (Plant cells have chloroplasts, a larger vacuole, & a cell wall, while animal cells don't)
What do ribosomes look like? Where are they found and what are their functions? Ribosomes look like studs or dots and are found in the rough ER and the cytoplasm. They link amino acids together to form proteins.
What is the function of the chloroplasts? What biological process occurs in this organelle? Chloroplasts make energy through photosynthesis
What does the central vacuole of a plant due? Stores water and other materials
The cell membrane helps to maintain homeostasis. Explain this process. The membrane controls what goes in and out of the cell through active and passive transport.
What is a phospholipid? Which part "likes" water and which part doesn't. Phospholipids make up the cell membrane. The polar phosphate head likes water and the non-polar lipid tail hates water.
How are phospholipids arranged in the cell membrane? They are in a phospholipid bilayer (two layers of them)
What is diffusion? The movement of molecules down a concentration gradient from high to low concentration.
During diffusion, substances always move from an area of ________ concentration to an area of ___________ low concentration. High, Low
What is Osmosis? Is this a type of active or passive transport? The diffusion of water. It's a type of passive transport.
What is the main difference between active and passive transport? (Think Energy) Active transport requires energy while passive transport doesn't.
What is facilitated diffusion? Diffusion through transport proteins since some molecules can't easily cross the membrane.
What's the function of a transport protein? To create a channel for polar molecules to cross the membrane.
What is endocytosis? What is exocytosis? Endocytosis - When the membrane encloses the material Exocytosis - When the material fuses with the membrane & gets released
The dialysis tube lab/demo showed an example of what type of passive transport? Diffusion
What did the dialysis tube represent? The cell membrane
Did the starch move through the dialysis tubing? Yes or no? Why or why not? No. It was too large to fit through the pores in the tube
Why did the starch solution turn colors? What color did it change? The iodine moved into the bag and it turned purple. Starch is an indicator of iodine and the color change indicated when they mixed.
Did the iodine in the beaker change colors? Yes or no? Why or why not? Starch wasn't present in the beaker because it didn't diffuse out of the tube
Created by: alldyn.sch



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