Lab 7 Quiz Flashcards
Unique DNA code is determined when ?
Moment of fertilization
When are your genes turned on or expressed
When your cells machinery makes a copy of the gene
Transcription
What happens to the transcribed nucleic acid message ?
The actions of proteins
Is then translated into proteins based on DNA code
Give rise to physical traits
You genotype determines your
Phenotype
If genes that are expressed have damaged or mutated DNA they coul?
Trigger the cell to become abnormal and divide uncontrollably causing cancer
Cancer is a group of diseases characterized by
Uncontrollable growth, division, spread of abnormal cells to the body
How do cancerous cells differ from normal cells
Do not respond to signals to stop dividing by mitosis
How does a tumor form and what does it do
Cancer cells divide by mitosis indefinitely piling on top of each other until they exhaust resources of the host
Tumors strain the host because they ?
Use resources but provide no function
How can cancerous cells spread ?
Through circulatory system by metastasis
Invade tissues and spread to circulatory where they are transported to all parts of the body
Cancer can be caused by mutations that are
Inherited
Viruses hijack the cells machinery in order to
Reproduce and can therefore sometimes induce cancer
Many ….. factors can mutate DNA
Some environmemtal carcinogens are
Environmental
Cigarette smoking pesticides food additives radiation
What is an epigenome
Where are they located
What do they control
Cellular elements
On top of genome
Whether genes are silenced or expressed
How can levels if gene expression be detected
DNA microarray
