a) What technique(s) can be used to determine the structure of the oxygen- evolving complex as shown in A?

You generate mutants in the metabolic pathway for starlase. You conduct some complementation tests (after testing for dominance of course) and come up with the following results: 1 2 4 6 1 + + + 2 + 3 + 4 + 5 6 a. How many complementation groups are there? [Select] b. You conduct some additional experiments to elucidate the starlase metabolic pathway. Your results are shown below. Use this information alongside information from the complementation table above to place the intermediates in the correct order on the pathway. (HINT: use the complementation groups from the table above to help you consolidate information on the tables below. Reference practice question 3 from today's lecture for help). Addition to minimal medium Mutant None starlase P 1 + + 2 + + 4 + + 5 + 6 Precursor --> [ Select ] [ Select ] [ Select ] --> starlase c. Mutant 4 has a loss-of-function mutation for which enzyme in the starlase synthesis pathway? [ Select ] E1 E2 ЕЗ Е4 Precursor > Intermediate 1→ Intermediate…

a. A single mutation in the riboswitch’s sequence changes the ligand binding specificity from guanine toadenine. Predict what single mutation could be made in the guanine-responsive riboswitch sequenceto convert it to an adenine-responsive riboswitch. Justify your answer b. Could a DNA molecule with the same nucleotide sequence as the guanine-responsive riboswitch bindguanine in a similar manner as the RNA-based molecule? Explain

in all cells observed to date, DNA serves as the stable, information-rivh molecule that stores genetic information. In contrast, in almost all cases, non-catalytic RNS serves as either a labile intermediate molecule involve in the production of proteins or as a labile regulatory molecule. A) based on the material, hypothesize why the molecule structures of DNA and RNA are, or are not, consistent with these two roles. B) RNA can also serve a catalytic role(ribosomes, RNA splicing, etc). What part of the RNA molecule would you predict makes it more likely than DNA to participate in enzymatic reactions? C) Explain how all these ideas may support as "RNA World Hypothesis" where RNA evolved first, followed by DNA and protein