Which two tests are done for prostate cancer?
A. PSA, testicle self-examination
B. digital rectal examination, PSA
C. testicle self-examination, fecal occult blood test
D. mammography, fecal occult blood test
E. digital rectal examination, Pap test
Answer: B
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Aerobic secondary treatment is usually best for ________ wastewater
A) industrial B) agricultural C) residential D) chemical
If the results of a set of experiments match predictions, the hypothesis must be rejected or revised
Indicate whether the statement is true or false.
Illustrate how the five basic human eye colors can be explained by a model using two genes (A and B), each of which
has two alleles (A and a, B and b).What will be an ideal response?
Cystic fibrosis is a recessively inherited disorder that results from a mutation in the gene encoding CFTR chlorine ion channels located on the surface of many epithelial cells. As shown in the figure, the mutation prevents the normal movement of chloride ions from the cytosol of the cell to the extracellular fluid. As a consequence of the mutation, the mucus layer that is normally present on the surface of cells becomes exceptionally dehydrated and viscous. An answer to which of the following questions would provide the most information about the association between the CFTR mutation and the viscous mucus?
A) Is the mucus also secreted from the cells through the CFTR proteins? B) How does the disrupted chloride movement affect the movement of sodium ions and water by the cell? C) How does the mutation alter the structure of CFTR proteins? D) What is the change in nucleotide sequence that results in the CFTR mutation?