ETHC 210 Exam 6 - Questions and Answers

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ETHC 210 EXAM 6 • Question 1 3 out of 3 points A mutation is an altered DNA sequence in an organism. • Question 2 3 out of 3 points Some genetic diseases like achondroplasia can occur by spontaneo... us mutation without a family history of the disease. • Question 3 3 out of 3 points Which of the following is true about the triplet code? • Question 4 3 out of 3 points Which of the following is true about mutations? • Question 5 3 out of 3 points A tumor is benign if it grows in place but does not spread. • Question 6 3 out of 3 points Which of the following is true about oncogenes. • Question 7 3 out of 3 points The mutation which causes sickle cell disease can be classified as a point mutation and also a missense mutation. • Question 8 3 out of 3 points Complex DNA repair mechanisms in many organisms is a challenge to Darwinian evolution because DNA repair is complex involving many proteins and Darwinian evolution would need to evolve all of these proteins simultaneously. • Question 9 3 out of 3 points Cancer metastases are difficulty to detect. • Question 10 3 out of 3 points If a mutation occurs in the gametes before mitosis; • Question 11 3 out of 3 points Which of the following is true about cancer cells? • Question 12 3 out of 3 points HER2 breast cancer affects hundreds of thousands of women each year. A drug called Herceptin has been an effective cure for this type of breast cancer. Herceptin is a; • Question 13 3 out of 3 points The two genetic diseases based on mutation of globin genes (globin proteins make up hemoglobin) are sickle cell disease and beta thalassemia. • Question 14 3 out of 3 points Translation is a process which; • Question 15 3 out of 3 points A mutation may be present in some cells of an individual or all cells. • Question 16 3 out of 3 points Which of the following is true about osteogenesis imperfecta? • Question 17 3 out of 3 points A deletion mutation removes DNA. For example small deletion mutations in the “Y” chromosome causes male infertility. • Question 18 3 out of 3 points Which of the following is true about xeroderma pigmentosum? • Question 19 3 out of 3 points A point mutation that changes a codon specifying an amino acid into a “stop” codon UAA, UAG or UGA is a nonsense mutation. • Question 20 3 out of 3 points The genetic mutation which causes sickle cell disease is a change in one amino acid of hemoglobin and is based on one nucleotide mutational change (point mutation). • Question 21 3 out of 3 points Which of the following is true about p53? • Question 22 3 out of 3 points The normal function of a tumor suppressor gene is to keep the cell cycle running at the appropriate rate for a particular cell type. • Question 23 3 out of 3 points Gleevec is a drug which helps cure a form of leukemia. • Question 24 3 out of 3 points Skin damage and skin cancer is caused by ultraviolet light striking DNA and causing thymine dimers or even cutting the DNA. In most cases this causes death of the skin cell. But cancer is uncontrolled cell growth. How can exposure to light cause uncontrolled cell growth when it mostly kills cells? Chose an answer which best answers this question • Question 25 3 out of 3 points The single amino acid change in hemoglobin which is the basis for sickle cell disease causes; [Show More]

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