Bio 250 Final Exams With Actual Correct Questions And Verified Detailed Rationales Answers 2024

1 | P a g e BIO 250 FINAL EXAMS WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED RATIONALES ANSWERS 2024 (NEWEST) ALREADY GRADED A+ Scientists study microorganisms on Earth today to search for life forms elsewhere, as well as to explore the origins of life on Earth. These microorganisms that are studied are referred to as: A. existing. B. extant. C. extinct. D. extirpated. B. extant. 62. The most important aspect of agar that makes it a useful ingredient for solidifying media for bacterial culture is A. It provides an excellent nitrogen source for bacteria. B. Bacteria are unable to break it down so it stays solidified. C. It melts at 100oC and solidifies at temperatures below 50oC. D. It provides an excellent carbon and energy source for bacteria. B. Bacteria are unable to break it down so it stays solidified. 63. Which molecule is believed to have preceded the other three during the evolution of life? A. ATP B. Proteins C. DNA D. RNA D. RNA 64. What is the most compelling reason why DNA, rather than RNA, evolved to be the storage repository for genetic information in cellular life forms? A. DNA has deoxyribose rather than ribose. B.