資訊推薦

• 50. Which one of the following statements as to TATA box is RIGHT?(A) A six-nucleotide-pair A+T-rich
• 【題組】 (2) 決定
• 2. The fundamental differences between RNA and DNA are(A) the organic bases only(B) bases, ribose un
• 3. Which contains a phosphoanhydride bond?(A) DNA(B) RNA(C) ATP(D) AMP(E) None of these
• 4. Which of the following best describes the structure of a nucleosome?(A)DNA wrapped around an octo
• 25. What is the product of the following reaction?   (A) (S)-1,2-propanediol (B) (R)-1,2-propanediol
• 5. Which of the following sequences of DNA is most likely to form Z-DNA?(A) (B) (C) (D)
• 23. Which of the following statements is true?(A) a triple bond is composed of two a bonds and one x
• 24. Which of the following statements best describes BF3 and NF3? (Nole: Geometry refers tothe elect
• 25. Which of the following molecules has a dipole moment?(A)SF4 (B)CF4 (C)XeF4 (D)SF6(E)XcF2
• 26. How many resonance structures does the have?(A)0 (B)1 (C)2 (D)3 (E)4
• 27. The first ionization energy of magnesium is approximately 700 kJ/mol. What is a goodestimate for
• 28. For any operating concentration cell, which of the following statements is true?(A)E and E°must
• 29. For any galvanic cell to operate, which of the following statements is true?(A)△G° and E° must b
• 30. In which case must a reaction be spontaneous at all temperatures?(A)△H is positive, and △S is po
• 31. Which is the percent dissociation of HF in a solution containing both 1.0 M HF and 1.0 MNaF ? (A
• 32. Which is the mathematical expression of solubility product(Ksp) for the molarsolubility(S) in (m
• 2. Heat energy of 743 J is needed to raise the temperature of 5 moles of an ideal gas by 2 K at cons
• 6. The human genome is though to have about how many genes?(A)10,000(B) 25,000(C) 50,000(D)100,000(E
• 7. Which of the following RNAs is the least abundant in a typical cell?(A)mRNA(B) rRNA(C) snRNA(D)tR
• 8. The following types of RNA are common to all organisms, except:(A)mRNA(B) rRNA(C) snRNA(D)tRNA(E)
• 9. The following enzyme is responsible for the bulk of DNA synthesis during replication.(A)DNA Polym
• 10. In E. coli,(A)the leading strand is synthesized in one piece while the lagging strand is synthes
• 11. Which of the following activities does E. coli DNA polymerase III lack?(A)5' → 3' poly
• 12. The primer for in vivo DNA replication is:(A)The 3' hydroxyl of the preceding Okazaki fragm