Cells Flashcards
What is the size of an animal cell?
0.01mm - 0.05mm
What is the size of a plant cell?
0.01mm-0.010mm
What is the best unit to measure cells?
um - micrometres
Cell magnification equation
image size = magnification x real size
If cells are in the mm then how are sub cell structures measured?
nano metres—nm
What are the main reasons for cell division?
- organism grows
- organism become damaged and needs to produce new cells
What is the 5th stage of the cell cycle?
The cyctoplasm and two cell membranes divide to form two identical cells.
What is the first stage of the cell cycle?
Cell growth
What is the fourth stage of the cell cycle?
Mitosis
What is the third stage of the cell cycle?
More growth takes place and the DNA is ckecked for errors
What is the second stage of the Cell Cycle?
DNA synthesis,which makes the chromosomes now double stranded.
What is the sixth stage of the cell cycle?
The cell stops dividing
What is the sixth stage of Mitosis
Trick question,there are only five stages
What is the first stage of mitosis?
The cell begins to divide.
What is the third stage of mitosis?
The nuclear membrane breaks down and the chromosomes line up across the cell.
What is the fourth stage of mitosis?
One set of chromosomes is pulled to each end of the cell and the nucleus divides
What is the last stage of mitosis the same as?
The fifth stage of the cell cycle.
What is the second stage of mitosis?
The DNA replicates to form two copies of each chromosomes
What is the fifth stage of mitosis?
The cyctoplasm and two cell membranes divide to form two identical cells.
How and why do cells become specialised?
Cells specialise by developing different sub-cellular structures in order to carry out specific functions
