High School And College Or University Essay

2222 WordsMay 7, 20129 Pages
Mirna Gazer May 1st, 2012 General Biology I Study Sheet 4: Biology 130 This study sheet is meant to guide you in your studying and this material is what you need to know for the FOURTH exam on Tuesday, May 1st. You need to convince yourself that you truly know these answers and this terminology. Your answers will be turned in on the day of the exam – think of it as your admissions ticket. . As always, I am available to answer any and all questions. 1. Explain the relationship between cancer and cell division. Cancer→ Is the uncontrolled of cells. Tumors are just massive clusters of cells that are dividing out of control. Cell division→ Is natural and controlled by the body. It is happening every second of everyday. Our body can regulate the division of cells with feedback from the body. 2. What is the difference between benign and malignant tumors? Benign→ Is not cancerous. It may grow larger but do not spread to other parts of the body. Malignant→ Is cancerous. It can invade and destroy nearby tissue and spread to other parts of the body. 3. The mutation of some genes causes cancer. Do you think such mutations would increase or decrease the activity of genes that produce growth factors? Increase and decrease. 4. Do you think such mutations would increase or decrease the activity of tumor suppressor genes (genes that produce proteins which slow the cell cycle)? Genes that produce proteins which slow the cell cycle. 5. Explain the difference between natural laws, theories and hypotheses. Natural laws→ Are an empirical observation held to be true. Theories→ It explains why the law holds true. 6. What are the 4 steps in the scientific method? 1) Observation and description of a phenomenon or group of phenomena. 2) Formulation of an hypothesis to explain the phenomena. 3) Use of the hypothesis to predict the

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