42. Based on Chargaff's data, if a DNA sample contains 30% guanine, what is the percentage of adenine? (A) 20% (B) 30% (C) 40% (D) 60%

1. Which of the following is NOT a distinctive property of living systems? (A) Living organisms exhibit a high level of organization. (B) Biological structures are related to specific functions. (C) Living systems have the capacity for reproduction. (D) Living systems do not carry out energy transformation.