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BIO 100 - EXAM 2 2025 QUESTIONS AND ANSWERS Insulin is a protein that is produced by pancreatic cells and secreted into the bloodstream. Since all the cells in a person's body contain the same DNA, why do only our pancreatic cells produce insulin? - ....ANSWER ...-Because some of our cells can be turned on or off to fulfill certain functions If we insert the human gene for insulin into bacteria, the bacteria will produce human insulin. How is this possible? - ....ANSWER ...-Because bacteria can reproduce asexually, cells can code and decode to proteins as normal humans After sequencing a molecule of DNA, you discover that 20% of the bases are cytosine (C). What percentage of the bases would you expect to be guanine (G)? What percentage of the bases would you expect to be thymine (T)? - ....ANSWER ...-There will be 20% Guanine because Guanine and Cytosine are complimentary, this leaves 60% to be Thymine Since DNA is contained in the nucleus of eukaryotic cells but protein synthesis occurs at ribosomes outside of the nucleus, how is the information in DNA conveyed to the ribosomes? - ....ANSWER ...-Through mRNA and transcription How many nucleotides are necessary to code for a protein that is 100 amino acids long? ....ANSWER ...-300 (1 amino acid = 3 nucleotides) …FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1