Card Set Information
Except Plant and Animal Cells stuff
Cell division is responsible for
growth - increases size
repair - repair damaged cells
reproduction - two identical cells
Skin cells or Somatic cells undergo
cells make up skin
cells that reproduce by cell division
the process that divides the nuclear material during cell division
DNA (deoxyribonuleic acid)
a long molecule that provides instructions for making, running, and repairing a cell
RNA (ribonucleic acid)
one strand of DNA
Why is DNA important?
DNA is the GENETIC CODE that is a unque pattern of base pairings to for characteristics.
Structure of DNA
twisted ladder, nucleotides, nitrogenous base molecule
: sugar and phosphate
Base Pairings: (nitrogenous bases)
Adenine & Thymine, Guanine & Cytosine
Cell Cycle- the sequence of events in the cell from one cell division to another
growing and working, 90%
sister chromotids visible, join 'X' shape, nuclear membrane breaksdown chromosomes spread out
spindle formed, chromotids attach to spindle fibres, chromotids line up in centre
chromotids pulled apart from spindle goes toward opposite poles of cell, chromotids called chromosoes
new chromosomes reach opposite poles
events of prophase happen in reverse
two nuclear membranes form
chromosomes lengthen and get thinner
divides cytoplasm in two daughter cells
pinching of cell membrance and cytplasm
between two new nuclei
a change in DNA (genetic code) of a cell
What does a mutation do?
A harmful mutation in a gene's DNA causes change in the protein that is produced.
What does a mutation affect?
The body's functions.
benign - harmless
malignant- harmful, spreads
What does a malignant tumor's cell look like?
The nuclei is enlarged, the cell is bigger.