What led to the discovery of cells?
Microscopes
What is the cell theory?
All living things are made of cells, all cells come from existing cells,cells are the basic units of structure and function in a cell
When the volume of a cell increases, its surface area
Increases at a slower rate
Surface area is an factor in limiting cell growth because
The cell may become tok large to take in enough food and to remove enough wastes
The size to which the cells can grow is limited by
Surface area-to-volume ratio
As a cell size increases the surface area-to-volume ratio
Decreases
To function most efficiently a cells size must be
Small
What would be the greatest shape that would allow a cell to have the greatest surface area-to-volume ratio
Broad and flat
A cube with the side length of 6mm has a surface of
1:1
One difference between prokaryotes and eukaryotes is that prokaryotes do jot have
A nucleus
Which cells have a cell membrane, cytoplasm, ribosomes, and DNA
All cells
The genetic material that provides instruction for making proteins is
DNA
A structure within a eukaryote cell that carries out specific activities inside the cell is called an
Organelle
What statement about prokaryotes is correct?
Their evolution preceded that of eukaryotes
Only eukaryotic cells have
Membrane bound organelles
Microfilaments, microtubules, intermediate fibers are three kinds of cytoskeleton
Fibers
Which cytoskeleton fiber would help a cell change shape to fit into a small space
Intermediate fibers
What is true between DNA and some proteins
Must be kept separate from cytoskeleton
Cell-membrane
Nucleus-nuclear envelope
The double membrane surrounding the nucleus is called
Nuclear envelope
In a cell, proteins are made on the
Ribosomes
Where are bound ribosomes located
Attached to membranes of other organelle
The organelle that moves proteins and other substances through the cell
Endoplasmic recticulum
The organelle that modifies, sorts, and packages proteins
Golgi apparatus
Cells that need a lot of energy might contain a large number of
Mitochondria
What do chloroplast and mitochondria have in common
They both make ATP
What is not found in plant and animal cells
A cell wall
What is a prokaryotic cell
Bacterium
What is true about colonial organisms
They can survive when seperated