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Ch. 7 Bio test questions
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Who used a compound microscope to see chambers within cork and named them CELLS?
ROBERT HOOKE
What are the principles of the Cell Theory?
Cells are basic units of life
All living things are made of cells
All cells are produced from existing cells
What type of details can electrom microscopes reveal?
Details that are 1000 times smaller than those visible in light microscopes
Which miscroscope can produce three-dimensional images of cell's surface?
Scanning electron microscope
How do you know that a cell is a prokaryote when looking through a microscope?
The cell lacks a nucleus
Who are the prokaryotes?
Bacteria
Who encloses their DNA in a nucleus?
Eukaryotes
What can a single cell organism (like an amoeba) accomplish?
It is able to carry out all of the functions necessary for life
What is a tissue?
A group of similar cells that perform a particular function
In a multicellular organism, what are the levels of organization from simplest to most comploex?
Cell > Tissue > Organ > Organ System
What is homeostasis?
The relatively constant internal physical conditions of an organism.
What is in the nucleus?
Nucleolus, chromatin, DNA
What is the function of the nucleus?
Stores DNA
Which organelle breaks down organelles that are no longer useful?
Lysosome
Which organelle stores materials, such as water, salts, proteins, and carbohydrates?
Vacuole (Be able to identify a vacuole in a plant cell graphic)
Which structure makes proteins?
Ribosome
Which organelle converts the chemical energy stored in food into usable energy?
Mitochondrion
What is the function of the cytoskeleton?
Helps a cell keep its shape
Which structures are involved in cell movement/moving the whole cell?
Microtubules & Microfilaments
Which organelle is found in plants but not animals?
Chloroplast
Which structure serves as the cell's boundary from its environment?
Cell membrane
What is the function of the cell membrane?
It regulates the movement of molecules into and out of the cell
Why does diffusion occur?
Molecules constantly move and collide with each other
What is the diffusion of water called?
Osmosis
What happens when solute concentration is the same on both sides of the membrane?
Molecules continue to move across the membrane in both directions
Why does an animal cell that is surrounded by fresh water burst?
Because osomotic pressure causes water to move into the cell
What class of molecules forms channals and pumps in the plasma membrane?
Proteins
What is the process called where a solute moves from high to low concentration but requires a protein channel through the membrane (ex. Glucose)?
faciliatated diffusion
Which means of particle transport requires input of energy from the cell?
Active transport
What is the path of a protein as it is being assembled?
Ribosomes > Endoplasmic Reticulum > Golgi Apparatus
Author
youngroos29
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130350
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Ch. 7 Bio test questions
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Ch. 7 Bio test questions
Updated
2012-01-25T02:26:20Z
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