A 41-year-old female with a family history of breast cancer has had a baseline mammogram. She states that she performs monthly self-breast exams but really has a hard time evaluating her lumps since she has numerous cysts.
At her annual mammogram, the technician views a suspicious area and refers her to the radiologist. She asks the nurse in the office, How can a lump appear so quickly? The nurse's response is based on which of the following principles?
A)
A tumor is undetectable until it has doubled 30 times and contains at least 1 billion cells.
B)
Many tumor cells never leave the M-phase of the cell cycle.
C)
Cancer cells are undifferentiated and come in various shapes and sizes.
D)
If the breast has a lot of cysts, then the fluid within those sacs makes it difficult to feel the hard lumps of a cancer.
Question 2
A researcher is involved in the investigation of an individual's genetic abnormality. Which of the following situations could the researcher most likely rule out as the genetic cause of a mutation?
A)
Loss of a cytosine-guanine base pair
B)
Formation of an adenine-uracil base pair
C)
Substitution of an adenine-thymine base pair for a cytosine-guanine base pair
D)
Insertion of an extra adenine-thymine base pair
Sika Deer Female
Causes of cancer.
An example of the sometimes drastic differences in placarding regulations in the United States ...
The Lorenz Curve for the United States, 2009
Pregnant female in lithotomy position
History