資訊推薦

• 17. Use VSEPR theory to predict the geometry of the BF3 molecule.(A) linear (B) bent (C) trigonal pl
• 18. Which one of the following molecules has tetrahedral geometry?(A) XeF4 (B) BF3 (C) AsF5 (D) CF4
• 19. Which one of the following molecules has a non-zero dipole moment?(A) BeCl2 (B) Br2 (C) BF3 (D)
• 20. Which one of the following molecules is polar?(A) PBr5 (B) CCl4 (C) BrF5 (D) XeF2
• 21. What is the strongest type of intermolecular force present in NH2CH3?(A)dispersion (B) dipole-di
• 22. Identify the compound that does not have hydrogen bonding.(A) (CH3)3N (B) H2O (C) CH3OH (D) HF
• 23. What is the type of intermolecular force for dissolving NaCl in H2O?(A)dispersion (B) dipole-dip
• 24. What is the type of intermolecular force for dissolving Br2 in H2O?(A)dispersion (B) dipole-dipo
• 25. Which of the following acids will have the strongest conjugate base?(A)HCl (B) HClO4 (C) HNO3 (D
• 26. Which one of the following salts, when dissolved in water, produces the solutionwith the lowest
• 27. Which of the following is a Lewis acid?(A) BBr3 (B) CCl4 (C) NH3 (D) CHBr3
• 2. Which attribute of biological membrane is NOT correct?(A) Membranes consist mainly of lipids and
• 3. Which molecule below is the key regulator of membrane fluidity in animals?(A) Glycolipids (B) Fat
• 4. Which description is NOT correct?(A) A nucleic acid consists of four kinds of bases linked to a s
• 5. Which of the following force does NOT exist in the quaternary structure of theprotein?(A) Electro
• 6. What kind of protein secondary structure is silk (fibroin) made of?(A) α-helix (B) β-sheet (C) β-
• 7. What type of inhibitor does penicillin belong to?(A) Competitive inhibition (B) Uncompetitive inh
• 8. Which enzyme reactions do NOT obey Michaelis–Menten kinetics?(A) Ping-pong reactions (B) Sequenti
• 9. Which of the following is least likely to cross a cellular membrane withouttransporters or channe
• 10. Which description is NOT correct?(A) Cyclic AMP stimulates the phosphorylation of many target pr
• 11. Which description is NOT correct?(A) The insulin receptor is a dimer that closes around a bound
• 12. What is a prion which cause mad cow disease?(A) Misfolded DNA (B) Misfolded RNA (C) Misfolded pr
• 13. Which of the following is NOT high energy molecule in cellular respiration?(A) ATP (B) AMP (C) N
• 14. Which of the following is NOT a second messenger molecule?(A) Estrogen (B) Inositol 1,4,5-trisph
• 15. The binding of signaling molecules to their receptors initiates pathways that leadto important p