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• 20. Which amino acid residue must be tagged on by covalent linkage of ubiquitin when proteins aretar
• 21. The binding change mechanism of ATP synthesis predicts that each 360-degree rotation of the γsub
• 22. What is the net charge of the following peptide at pH 7.0?Tyr-Glu-Ser-Arg-Met-Thr-Asp-Asn-Tyr-Hi
• 23. Which of the following molecules can generate the highest yield of ATP in the process fromglycol
• 24. Which method is used to predict the amino acid sequence of tryptic fragments by bioinformaticapp
• 25. Which step of the mitochondrial electron transport chain does rotenone inhibit?(A) NADH → coenzy
• 26. Regarding the chemiosmotic theory of the respiratory chain, which statement is TRUE?(A) Oxidativ
• 27. Which of the following sets of amino acids are directly involved in the biosynthesis of creatine
• 28. Hydropathy plot is commonly used for ______.(A) predicting the quaternary structure of membrane
• 29. What substance(s) can affect the concentration of calcium ions inside the cell, an importantseco
• 30. Which statement is TRUE?(A) A higher Km value indicates a higher substrate specificity.(B) A hig
• 31. Which description about interaction between species is NOT true?(A) Predation: An individual of
• 32. Fungal cells can reproduce asexually by undergoing mitosis, followed by cytokinesis. Many fungic
• 33. Which is a TRUE statement concerning genetic variation?(A) It is created by the direct action of
• 34. Why do RNA viruses appear to have higher rates of mutation?(A) RNA viruses are more sensitive to
• 35. To prevent irreversible tragedies, the CDC urges the public not to use blood donation as a means
• 36. Which of the following characters is NOT a terrestrial adaptation of plants?(A) Waxy stomata to
• 37. Which of the following genetic changes of K-Ras is detected in over 90% of human pancreaticcance
• 38. In the process of human gametogenesis, which cell is haploid?(A) Spermatogonium (B) Primary sper
• 39. In humans, the phenylalanine hydroxylase gene is 90,000 bases (90 kb) long, yet the mRNA isonly
• 40. Which of the following organelles CANNOT be found in animal cells?(A) Lysosome (B) Central vacuo
• 41. Which is NOT a source of genetic variation that makes evolution possible?(A) Oxidative phosphory
• 42. Which of the following systems allow arthropods to propel the hemolymph into hemocoel?(A) Closed
• 43. What is the evolutionary sequence that is believed to have given rise to the chloroplasts of lan
• 44. Which of the following statements about genetic drift is TRUE?(A) Genetic drift is significant i