1. In what way does the ras oncogene contribute to cancers?
It stops the cell cycle and allows for damage to be repaired
It stops the gene cycle and allows for damage to be repaired
Codes a protein that does not require activation by it's receptor so it's signalling pathway is permanently switched on and leads to uncontrolled cell proliferation.
Codes a protein that requires activation by it's receptor so it's signalling pathway is permanently switched on and leads to uncontrolled cell proliferation.
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Other questions in this quiz
2. What four places can tissue-specific (adult) stem cells could be found ?
Bone Marrow, Kidneys, Lungs and Liver
Bone Marrow, Brain, Heart and Liver
Bone Marrow, Brain, Kidneys and Lungs
Bone Marrow, Brain, Heart and Kidneys
3. What are the correct properties of cancer cells?
They grow and divide without stimulation from a growth factor and never stop. They spread to other parts of the body. They remain undetected by the immune system. DNA damage does not halt cell division. They can replicate an unlimited number of times.
They grow and divide without stimulation from a growth factor and never stop. They spread to other parts of the body. They remain undetected by the immune system. DNA damage halts cell division. They can replicate an unlimited number of times.
They grow and divide with stimulation from a growth factor and never stop. They spread to other parts of the body. They remain undetected by the immune system. DNA damage does not halt cell division. They can replicate an unlimited number of times.
They grow and divide without stimulation from a growth factor and never stop. They spread to other parts of the body. They remain undetected by the immune system. DNA damage does not halt cell division. They can't replicate an unlimited number of times.
4. What are the correct definitions of benign and malignant
Malignant - Spread all throughout the body and cause secondary tumours(Mitosis). Benign - Do not spread from their site of origin.
Malignant - Spread all throughout the body and cause secondary tumours(Metastasis). Benign - Do not spread from their site of origin.
Malignant - Spread all throughout the body and cause secondary tumours(Meosis). Benign - Do not spread from their site of origin.
Malignant - Spread all throughout the body and cause secondary tumours(Metastasis). Benign - Do not spread far from their site of origin.
5. What are the correct characteristics of stem cells?
They have the ability to continuously divide for long periods of time. They are unspecialised. They can't give rise to specialised cell types.
They have the ability to continuously divide for long periods of time. They are specialised. They can give rise to specialised cell types.
They have the ability to continuously divide for long periods of time. They are unspecialised. They can give rise to specialised cell types.
They have the ability to continuously divide for long periods of time. They are unspecialised. They can give rise to specialised genes.
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