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All cells arise from
pre-existing cells
The basic unit of structure & function in an organism is the _____
Cell
As cells size decreases, its surface area-to-volume ratio _______
decreases
"cells arise only from exsisting cells" is part of the ____________
Cell Theory
The surface area-to-volume ratio limits a cell's _____
size
Eukaryotic cells contain specialized structures called __________
organelles
A cell with a nucleus is a ________ cell
Eukaryotic
Scientists think that _______ cells evolved about 1.5 billion yrs ago
eukaryotic
All substances that enter or leave a cell must cross the cell__________
membrane
The _______ houses a cell's DNA, which contains genetic material
nucleus
The organelles where protein synthesis occurs in a cell are the _______
ribosomes
Prokaryotic cells have a cell ______ that surround cell membrane
wall
Some prokaryotic cells have a ________ that surrounds the cell wall
capsule
____________ cells have a system of internal membranes that divides the cytoplasm into compartments
Eukaryotic
The web of protein fibers that support the shape of cell is____________
cytoskeleton
The cytoskeleton's network of __________ fibers anchors cell organelles
protein
A ribosome is made of _____ and many proteins
RNA
DNA instructions are copied as ____ messages
RNA
Ribosomes use RNA messages to assemble _________
protein
The ____________ is a structure that makes ribosomes parts in the nucleus
Nucleolus
Rough ER has ___________ attatched to its surface
ribosomes
____________ ER has no attatvhed ribosomes
Smooth
Vesicles that contain newly made proteins move through the ____________ from the ER to the Golgi Apparatus
cytoplasm
Vesicle help maintain _____________ by storing and realeasing various substances as the cell needs them
homeostasis
Lysosomes work by fusing with other ____________
vesicles
Photosynethesis takes place in the _______ of plant cells
chloroplast
Both plant & animal cells have cell membranes. But plant cells are surrounded by a ____________
cell wall
In multicellular organisms, similar cells group together to make ____________
tissue
A group of identical cells that can survive alone if separated are called ____________ organisms
colonial
What are the three parts of the cell theory?
*all cells arise from exsisting cells
*Cells are the basic structures & functions in an organism
*All living things are made up of 1 or more cells
Whats happens to a cell's surfave area-to-volume ration as the cell gets larger?
gets smaller
What is the difference in the location of DNA in a prokaryotic cell and in a eukaryotic cell?
DNA is in the nuclues in eukaryotic cells
What is the functions of organelles in eukaryotic cells?
carry out specialized functions
What kind of ribosomes make proteins that remain inside the cell?
free ribosomes
Whats the function of the contractile vacoule in a protist?
holds and carries out water
What are three extra structures in plant cells?
Chloroplast, cell wall, central vacoule
What are the levels of organization of cells in multicellular organism
organism
^
organ system
^
organ
^
tissue
^
cell
Author
sydneysara55
ID
170129
Card Set
SydneySara55
Description
Biology (chapter 7)
Updated
2012-09-11T01:48:25Z
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