Samplemidterm-1

Samplemidterm-1 - NAME_ NAME_ First Last Student #ID_ LS3,...

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NAME________________________________________________________________________________ 1 NAME_____________________________________________________________ First Last Student #ID__________________________________ LS3, MIDTERM EXAM I 5pm-6:50pm, January 30, 2008 1. Write your name and student ID on both Scantron and the exam pages. 2. Check the exam to make sure you have every page before start. Read carefully the question, the multiple choices, and figures included on the last page of the exam. You should select the BEST answer, and register your answer on Scantron, also circle your answers on the exam pages. 3. Hand in both Scantron and the exam to TAs after you complete the exam. You may want to record your answers on a separate paper and take it with you, so you may compare yours with the key posted online shortly after the midterm. 4. Midterm I has 35 multiple-choice questions and 200 points total, Question 1-30 are worth 5 points each, Question 31-35 are worth 10 points each. 5. Use your common sense. Do not spend too much time on any single question. Good luck! Blue colored are correct
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NAME________________________________________________________________________________ 2 1. Which feature of the following is not true for a gene? A). Genes determine all biological traits B). Genes are made by condensation reactions C). Genes are polydeoxyribonucleotide D). Genes is the exact DNA sequence copied into a polypeptide E). Different genes are chemically and physically similar. 2. All of the following are true for DNA except A. its phosphodiester bonds are relatively stable in acid B. its phosphodiester bonds are relatively stable in alkaline C. its phosphodiester bonds are relatively stable in DNase solution D. it is the longest molecule in the cell E. it is the largest molecule in the cell 3. The structure of two molecule shown on the right are A. pyrimidine and purine B. deoxyribose and ribose C. ribose and histidine D. deoxyribose and pyrimidine E. ribose and proline 4. The bonds that connect adenine to thymine in a DNA double helix are primarily A. ionic. B. hydrophobic. C. hydrogen. D. covalent. E. none of the choices are correct. 5. An experiment was conducted to determine the base content of 5 mouse DNA samples. Results are shown in the table below. Determine which sample of DNA absorbs the least amount of UV light of 260nm at a temperature above 50 degree C? DNA1 DNA2 DNA3 DNA4 DNA5 %G+C 25 75 80 90 20 %A+T 75 25 20 10 80 A. DNA1 B. DNA2 C. DNA3 D. DNA4 E. DNA5
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NAME________________________________________________________________________________ 3 6. The ability of two polynucleotide strands to hybridize is based on which of the following principles? A. double helical nature of DNA
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This note was uploaded on 02/20/2009 for the course LS 3 taught by Professor Lin during the Spring '06 term at UCLA.

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Samplemidterm-1 - NAME_ NAME_ First Last Student #ID_ LS3,...

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