MICROBIO 160 EXAM 1

MICROBIO 160 EXAM 1 Biology of Cancer and AIDS ANSWER KEY Exam 1A, Spring 2012 Green OPSCAN SHEET 1. What determines the stage of a patient's cancer? (A) size ratio of nucleus and cytoplasm (B) The site of primary tumor development (C) The extent of tumor spread (D) drama critics (E) Both A and C 2. Unlike normal cells, cancer cells can grow in a density and independent manner. (A) anchorage (C) blood supply (B) oxygen (D) nutrient 3. Overall, most cases of cancer occur in people aged: (A) 14 years old and younger (B) 25-49 years old (C) 15-24 years old (D) 50 years old and older 4. Robert Koch is best known for a set of rules he created, referred to as Koch's postulates. What is the purpose of Koch's postulates? (A) They help to determine if a particular chemical is a carcinogen (B) They form the basis for most modern epidemiology studies (C) They assist in tracking cancer cells through the body (D) They help to determine if a particular infectious agent causes a certain disease 5. Microscopic examination of a tissue biopsy is an important tool for diagnosing cancer. Cancer cells have a mitotic index; a measure of . (A) lower, cell division rate (B) higher, cell death (C) lower, higher likelihood of metastatic cancer (D) higher, cell division rate 6. Which of the following processes is likely to be associated with the majority of cancer deaths? (A) Uncontrolled cell division during hyperplasia (C) Aggressive carcinoma in-situ (B) New mutations that lead to tumor enlargement (D) metastasis 7. The human genome is the sum of all the DNA base pairs in 46 human chromosomes. The human genome contains nucleotides. Three nucleotides code for and a protein machine called the is responsible for making all the proteins in our body. (A) 30 million, a peptide, nucleus (B) 3 billion, an amino acid, ribosome (C) 25,000, a lipid, mitochondria (D) 3000, protein, cytoplasm (E) 3 million, glycoprotein, mRNA 8. The experiment outlined in the diagram below demonstrates that cancer cells can .