Cell Theory
Cell theory states that all organisms are made of cells, cells are the basic unit of life, and
all existing cells are produced by other living cells
As the concentration of molecules outside of the cell increases, more molecules will enter the cell because...
the molecules are moving down their concentration gradient
Prokaryotic cells do not have
organelles
These organelles contain enzymes that break down old cell parts
lysosomes
The nucleus is
the storehouse for most of the cell's genetic information
What makes the cell theory a scientific theory?
It is based on the work of many scientists and leads to accurate predictions.
Which process is occurring when a vesicle fuses with the cell membrane and releases its contents outside of the cell?
exocytosis
Do prokaryotic cells like bacteria have cell walls?
Yes
Which organelle do plant cells have to carry out photosynthesis?
chloroplasts
The rough ER is studded with
ribosomes
What is a major principle upon which cell theory is based?
All organisms are made up of cells.
Facilitated diffusion occurs when
molecules move down a concentration gradient from an area with more molecules to an area with less.
What would make attacking a prokaryotic cell easier for a virus?
Unlike eukaryotic cells, prokaryotic cells do not have a nucleus.
Transport proteins play a role in
both active and passive transport.
The jellylike substance that is contained inside the cell membrane is
cytoplasm
Which invention played the biggest role in the discovery of cells by early scientists?
compound microscope
A protein that detects a signal molecule and performs an action in response is called a
receptor
If a cell has organelles, it is a _________________ cell.
eukaryotic
Facilitated transport requires
no energy from the cell.
A network of proteins that provides support to a cell is called
the cytoskeleton
500 pts if you can name all three parts of the cell theory without looking at notes or the book.
1. All organisms are made of cells
2. Cells are the most basic unit of life
3. Existing cells are produced by other living cells
If a solution has fewer solutes than the cell, it is a __________ solution.
Some differences between plant and animal cells are
plant cells have cell walls and chloroplasts, animal cells do not.
The golgi apparatus is where proteins are
processed and delivered
Which organelle provides energy to the cell?
mitochondria