Which of the following are the level of biological structure at which stem cells play a part? Select all that apply. A. macromolecular level  B. cellular/ organelle levels  C. tissue/ organ level  D. organismal level  E. all of the above  none of the above

1. Following are several further results that you get from your cancer research. For each result, list the type of array or type of experiment that could have been used to do the study. a. Tissue biopsies were taken from cancer patients. Normal cells were found to have CD81 antigen on their cell surface but stage 4 cancer cells are lacking the antigen; confirming the microarray results. b. Out of thousands of possible therapeutic agents (drugs) that were screened, seven were found to bind to Annexin I. c. In pancreatic cancer there are gains in chromosomes 1q, 2, 3, 5, 7p and losses in 1p, 3p, 6, and 9p.

Please help me with the multiple choice question below - it is based on genomics/developmental biology.

2. A researcher is studying the effects of a novel cancer drug on cell division and comparing the new drug to a traditional chemotherapy drug. The traditional drug causes numerous side effects such as nausea, vomiting, hair loss and susceptibility to infections due to low white blood cell counts. The novel drug is a targeted therapy (specifically targets the abnormal protein in the cancer cell) and is likely to reduce side effects that patients experience when treated with traditional chemotherapy. One group of cancer patients was treated with the novel drug and a second group of cancer patients was treated with the traditional chemotherapy drug. Prior and subsequent to treatment, a mitotic index was obtained from a tumor sample from each patient as well as a bone marrow sample (bone marrow cells give rise to all blood cell types including red blood cells and white blood cells). Since this is a double-blind study (neither the patient nor the researcher knows which patients received…